Houston lab's breakthrough light-harvesting processes near market readiness

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The new process developed by Rice University researchers makes solar cells that are about 10 times more durable than traditional methods. Photos by Jeff Fitlow/Rice University

A groundbreaking Rice University lab has made further strides in its work to make harvesting light energy more efficient and stable.

Presented on the cover of a June issue of Science, a study from Rice engineer Aditya Mohite's lab uncovered a method to synthesize a high-efficiency perovskite solar cell, known as formamidinium lead iodide (FAPbI3), converting them into ultrastable high-quality photovoltaic films, according to a statement from Rice. Photovoltaic films convert sunlight into electricity.

The new process makes solar cells that are about 10 times more durable than traditional methods.

“Right now, we think that this is state of the art in terms of stability,” Mohite said in a statement. “Perovskite solar cells have the potential to revolutionize energy production, but achieving long-duration stability has been a significant challenge.”

The change come from "seasoning" the FAPbI3 with 2D halide perovskites crystals, which the Mohite lab also developed a breakthrough synthesis process for last year

The 2D perovskites helped make the FAPbI3 films more stable. The study showed that films with 2D perovskites deteriorated after two days of generating electricity, while those with 2D perovskites had not started to degrade after 20 days.

“FAPbI3 films templated with 2D crystals were higher quality, showing less internal disorder and exhibiting a stronger response to illumination, which translated as higher efficiency," Isaac Metcalf, a Rice materials science and nanoengineering graduate student and a lead author on the study, said in the statement.

Additionally, researchers say their findings could make developing light-harvesting technologies cheaper, and can also allow light-harvesting panels to be lighter weight and more flexible.

"Perovskites are soluble in solution, so you can take an ink of a perovskite precursor and spread it across a piece of glass, then heat it up and you have the absorber layer for a solar cell,” Metcalf said. “Since you don’t need very high temperatures ⎯ perovskite films can be processed at temperatures below 150 Celsius (302 Fahrenheit) ⎯ in theory that also means perovskite solar panels can be made on plastic or even flexible substrates, which could further reduce costs.”

Mohite adds this has major implications for the energy transition at large.

“If solar electricity doesn’t happen, none of the other processes that rely on green electrons from the grid, such as thermochemical or electrochemical processes for chemical manufacturing, will happen,” Mohite said. “Photovoltaics are absolutely critical.”

The Mohite lab's process for creating 2D perovskites of the ideal thickness and purity was published in Nature Synthesis last fall. At the time, Mohite said the crystals "hold the key to achieving commercially relevant stability for solar cells."

About a year ago, the lab also published its work on developing a scalable photoelectrochemical cell. The research broke records for its solar-to-hydrogen conversion efficiency rate.

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Woodside Energy has committed $12.5 million to a new partnership with Rice University. Photo via Instagram/WoodsideEnergy

Woodside Energy backs $12.5M clean energy accelerator for new technologies

howdy, partner

A global Australian energy company with its international operations in Houston has backed a new climatetech accelerator in partnership with Rice University.

Woodside Energy, headquartered in Australia with its global operations in Houston following its 2022 acquisition of BHP Group, has committed $12.5 million over the next five years to create the Woodside Rice Decarbonization Accelerator.

"The goal of the accelerator is to fast track the commercialization of innovative decarbonization technologies created in Rice labs," Rice University President Reginald DesRoches says to a crowd at the Ion at the initiative's announcement. "These technologies have the potential to make better batteries, transitistors, and other critical materials for energy technologies. In addition, the accelerator will work on manufacturing these high-value products from captured and converted carbon dioxide and methane."

"The Woodside Rice Decarbonization Accelerator will build on the work that Rice has been doing in advanced materials, energy, energy transition, and climate for many years. More than 20 percent of our faculty do some related work to energy and climate," he continues. "Harnessing their efforts alongside an esteemed partner like Woodside Energy is an exciting step that will undoubtedly have an impact far and wide."

Rice University announced the new climate tech initiative backed by Woodside Energy this week. Photo by Natalie Harms/InnovationMap

Woodside, which has over 800 employees based in Houston, has been a partner at the Ion since last spring. Daniel Kalms, Woodside Energy's CTO and executive vice president, explains that the new initiative falls in line with the three goals of Woodside's climate strategy, which includes keeping up with global energy demand, creating value, and conducting its business sustainably. The company has committed a total of $5 billion to new energy by 2030, Kalms says.

"We know that the world needs energy that is more affordable, sustainable, and secure to support the energy transition — and we want to provide that energy. Energy that is affordable, sustainable, and secure requires innovation and the application of new technology. That's what this is about," he says.

"Of course collaboration will be the key," Kalms continues. "By working with researchers, entrepreneurs, leading experts and parallel industries, we can combine our capability to solve collective challenges and create shared opportunities. That's why we are excited to be partnering with Rice."

The accelerator will be run by Paul Cherukuri, vice president of innovation at Rice University, and Aditya Mohite, associate professor of Chemical and Biomolecular Engineering and Materials Science and Nanoengineering. Additional Rice professors will be involved as well, Cherukuri says.

"Success for us will not be papers, it will be products," Cherukuri says of what Woodside wants from the partnership. "We picked faculty at Rice in particular who were interested in taking on this charge, and they were all faculty who created companies."

Last fall, Rice announced a grant and venture initiative to accelerate innovation from Rice in the biotech space.

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This article originally ran on InnovationMap.

Rice University engineers and collaborators developed a technology that converts light into electricity. Photo by Jeff Fitlow/Rice University

Houston research team develops breakthrough process for light-harvesting crystals in DOE-backed project

solar success

A team of Rice researchers have developed a breakthrough synthesis process for developing light-harvesting materials that can be used in solar cells to convert light into electricity.

Detailed in an October study in Nature Synthesis, the new process is able to more closely control the temperature and time of the crystallization process to create 2D halide perovskites with semiconductor layers of “ideal thickness and purity,” according to a release from Rice.

The process, known as kinetically controlled space confinement, was developed by Rice University chemical and biomolecular engineer Aditya Mohite, along with others at Northwestern University, the University of Pennsylvania and the University of Rennes. The research was backed by the Department of Energy, the Army Research Office, the National Science Foundation and a number of other organizations.

“This research breakthrough is critical for the synthesis of 2D perovskites, which hold the key to achieving commercially relevant stability for solar cells and for many other optoelectronic device applications and fundamental light matter interactions,” Mohite said in a statement.

Traditional synthesis methods for creating 2D halide perovskites, which have been shown to offer a high-performance low-cost way to produce solar cells, have generated uneven crystal growth when attempting to reach a higher n value. And uneven crystal growth can result in a less reliable material, while a high n value can result in higher electrical conductivity, among other benefits.

The study shows how the kinetically controlled space confinement method can gradually increase n values in 2D halide perovskites, which will assist in the production of crystals with a certain thickness.

“We designed a way to slow down the crystallization and tune each kinetics parameter gradually to hit the sweet spot for phase-pure synthesis,” Jin Hou, a Ph.D. student at Rice and a lead author on a study, said in a statement.

The process is expected to improve the stability and lower the costs of emerging technologies in optoelectronics, or the study and application of light-emitting or light-detecting devices, and photovoltaics, the conversion of thermal energy into electricity.

"This work pushes the boundaries of higher quantum well 2D perovskites synthesis, making them a viable and stable option for a variety of applications,” Hou added.

Houston universities have been making major strides relating to crystallization processes in recent months.

In September, the University of Houston announced The Welch Foundation awarded its inaugural $5 million Catalyst for Discovery Program Grant to establish the Welch Center for Advanced Bioactive Materials Crystallization. The center will build upon UH professor Jeffrey Rimer's work relating to the use of crystals to help treat malaria and kidney stones.

Over the summer, a team of researchers at UH also published a paper detailing their discovery of how to use molecular crystals to capture large quantities of iodine, one of the most common products of radioactive fission, which is used to create nuclear energy.

Rice University engineers have created a device that absorbs light, converts it into electricity, and then uses the electricity to split water molecules and generate hydrogen. Photo courtesy Gustavo Raskoksy/Rice University

Rice University team breaks records with new sunlight-to-hydrogen device

big win

A team of Rice University engineers have developed a scalable photoelectrochemical cell that converts sunlight into clean hydrogen at a record-setting pace.

The lab led by Aditya Mohite, an associate professor at Rice, published the findings in a study in Nature Communications late last month, in collaboration with the National Renewable Energy Laboratory, which is backed by the Department of Energy. In it, the team details how they created a device that absorbs light, converts it into electricity, and then uses the electricity to split water molecules and generate hydrogen.

Austin Fehr, a chemical and biomolecular engineering doctoral student at Rice and one of the study’s lead authors, says in a statement that the device "could open up the hydrogen economy and change the way humans make things from fossil fuel to solar fuel."

The device has a high solar-to-hydrogen conversion efficiency rate of 20.8 percent, which has yet to be reached with this type of technology, according to a release from Rice. In addition to its speed, this device is groundbreaking because it uses low-cost metal-halide perovskite semiconductors to power the reaction.

A photoreactor developed by Rice University’s Mohite research group and collaborators achieved a 20.8 percent solar-to-hydrogen conversion efficiency. Photo courtesy Gustavo Raskoksy/Rice University

“Using sunlight as an energy source to manufacture chemicals is one of the largest hurdles to a clean energy economy,” Fehr says in the statement. “Our goal is to build economically feasible platforms that can generate solar-derived fuels. Here, we designed a system that absorbs light and completes electrochemical water-splitting chemistry on its surface.”

To create the device the Mohite lab turned their existing solar cell into a reactor to split water into oxygen and hydrogen. However they continued running into issues with the semiconductors being "extremely unstable in water," according to Rice.

After two years of trials and errors, the team uncovered that by adding two layers of barriers to the semiconductors they were able to reach these record-breaking efficiency rates.

The team has also shown uses for their double barrier design with different semiconductors and for different reactions.

“We hope that such systems will serve as a platform for driving a wide range of electrons to fuel-forming reactions using abundant feedstocks with only sunlight as the energy input,” Mohite says in the statement.

The device joins another game-changing product shared in a Rice research study in recent weeks. Last month, a Rice University lab led by Haotian Wang, the William Marsh Rice Trustee Chair and an associate professor at Rice, shared their findings on how their simple plug-and-play device removes carbon dioxide from air capture to induce a water-and-oxygen-based electrochemical reaction.

Rice also recently opened registration for its 20th anniversary of Energy Tech Venture Day. Click here to register for the event on Sept. 21.

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Houston researchers harness dialysis for new wastewater treatment process

waste not

By employing medical field technology dialysis, researchers at Rice University and the Guangdong University of Technology in China uncovered a new way to treat high-salinity organic wastewater.

In the medical field, dialysis uses a machine called a dialyzer to filter waste and excess fluid from the blood. In a study published in Nature Water, Rice’s team found that mimicking dialysis can separate salts from organic substances with minimal dilution of the wastewater, addressing some of the limitations of previous methods.

The researchers say this has the potential to lower costs, recover valuable resources across a range of industrial sectors and reduce environmental impacts.

“Traditional methods often demand a lot of energy and require repeated dilutions,” Yuanmiaoliang “Selina” Chen, a co-first author and postdoctoral associate in Elimelech’s lab at Rice, said in a news release. “Dialysis eliminates many of these pain points, reducing water consumption and operational overheads.”

Various industries generate high-salinity organic wastewater, including petrochemical, pharmaceutical and textile manufacturing. The wastewater’s high salt and organic content can present challenges for existing treatment processes. Biological and advanced oxidation treatments become less effective with higher salinity levels. Thermal methods are considered “energy intensive” and susceptible to corrosion.

Ultimately, the researchers found that dialysis effectively removed salt from water without requiring large amounts of fresh water. This process allows salts to move into the dialysate stream while keeping most organic compounds in the original solution. Because dialysis relies on diffusion instead of pressure, salts and organics cross the membrane at different speeds, making the separation method more efficient.

“Dialysis was astonishingly effective in separating the salts from the organics in our trials,” Menachem Elimelech, a corresponding author on the study and professor of civil and environmental engineering and chemical and biomolecular engineering at Rice, said in a news release. “It’s an exciting discovery with the potential to redefine how we handle some of our most intractable wastewater challenges.”

Virtual power plant from Houston-area company debuts at CES

Powering Up

Brookshire, Texas-based decentralized energy solution company AISPEX Inc. debuted its virtual power plant (VPP) platform, known as EnerVision, earlier this month at CES in Las Vegas.

EnerVision offers energy efficiency, savings and performance for residential, commercial and industrial users by combining state-of-the-art hardware with an AI-powered cloud platform. The VPP technology enables users to sell excess energy back to the grid during demand peaks.

AISPEX, or Advanced Integrated Systems for Power Exchange, has evolved from an EV charging solutions company into an energy systems innovator since it was founded in 2018. It focuses on integrating solar energy and decentralized systems to overcome grid limitations, reduce upgrade costs and accelerate electrification.

Regarding grid issues, the company hopes by leveraging decentralized solar power and Battery Energy Storage Systems (BESS), EnerVision can help bring energy generation closer to consumption, which can ease grid strain and enhance stability. EnerVision plans to do this by addressing “aging infrastructure, grid congestion, increasing electrification and the need for resilience against extreme weather and cyber threats,” according to the company.

One of the company's latest VPP products is SuperHub, which is an all-in-one charging station designed to combine components like solar panels, energy storage systems, fast EV chargers, mobile EV chargers and LCD display screens, into a unified, efficient solution.

“It supports clean energy generation and storage but also ensures seamless charging for electric vehicles while providing opportunities for communication or advertising through its built-in displays,” says Vivian Nie, a representative from AISPEX.

Also at CES, AISPEX displayed its REP Services, which offer flexible pricing, peak load management, and renewable energy options for end-to-end solutions, and its Integrated Systems, which combine solar power, battery storage, EV charging and LCD displays.

“We had the opportunity to meet new partners, reconnect with so many old friends, and dive into discussions about the future of e-mobility and energy solutions,” CEO Paul Nie said on LinkedIn.

In 2024, AISPEX installed its DC Fast chargers at two California Volkswagen locations.

Houston-based energy transition leader talks new role, shares future predictions

new hire

For some companies, all that’s needed to make a seismic shift toward innovation is to hire the right person to steer the organization in a transcendent direction.

Arcadis, a sustainable design, engineering, and consultancy solutions company, is channeling this concept by hiring Masjood Jafri as its new National Energy Transition Strategic Advisor and Business Development Lead. In the role, Jafri will help lead and develop the company’s energy transition business growth and strategy for its interests in the United States alongside Matthew Yonkin, National Energy Transition Solution Leader, based in New York.

“I have a fairly diverse background, with about a decade in the energy industry with an oil and gas, power and petrochemicals background,” says Jafri, who moved to Houston from the U.K. back in 2012. “But prior to that, I had about a decade in the infrastructure world, looking into the transportation market, and the manufacturing sector, as well as working as a lender's advisor in the capital market. So, in this very transformative period, you need to connect all the dots.”

With just over six months in his new role, Jafri leverages his 20 years of experience in leading the successful delivery of capital programs and projects as the strategic advisor to Arcadis’ own capital projects.

“Arcadis is on a journey to be the sustainability partner or sustainable transformation partner for our clients,” Jafri says. “And the path to sustainability goes through energy transition. Arcadis has been investing quite heavily in that space for us to be a leading consulting services provider for energy companies.

Jafri’s hire comes as Arcadis moves its business operations in Houston to a new centralized office in the Galleria area. According to Jafri, this will bring the company’s expertise under one roof. With Houston being the energy capital of the world, Jafri says Arcadis is positioned to lead and deliver results for the energy demand in the United States and globally.

“Houston is the Silicon Valley of energy,” Jafri says. “The challenge is to continue to drive with that force. … We have the talent in the city, we have the right mindset—very entrepreneurial, and obviously a lot of capital commitment to make these changes.

“And it is not just coming from the private sector, it is also coming from the public sector. So, I think the stars are aligning in the context of what is needed for us to have a planet-positive future and Houston being suitably positioned to deliver to that,” he adds.

And while keeping up with the demand for energy and moving towards clean energy are equally important challenges, Jafri is more focused on addressing the latter.

“Clean energy is certainly a bigger challenge because it requires a very broad area of energy sources to come together and to make it cleaner,” Jafri says. “Technologically, some of those things are not ready yet, at least to be scalable in a commercial and profitable way. So that's the challenge. I think it is a clean energy challenge, but obviously, the demand side makes it a bit more complicated.”

Texans, and more specifically Houstonians, have seen firsthand the complications of demand and the pitfalls of energy security and resilience. Addressing these issues, along with many other sustainability challenges, will also be part of Jafri’s core mission at Arcadis.

“As we saw in severe climate conditions, the grid is vulnerable and so are the people connected to the grid,” Jafri says. “The better we can make the grid more resilient and more adaptive to these changes, the more satisfactory conditions will be on the ground for people who are affected.”

Jafri asserts that the industry is already considering numerous options, including all colors of hydrogen, solar, wind and geothermal, in addition to fossil-based energy (natural gas). These measures are already in progress, but consumers are concerned with climate change and, of course, the impact on their electricity bills. Still, states like California, Washington and Texas are making progress.

“I would say by the year 2030 you would start to see a pretty significant movement in the right direction,” Jafri says. “If you look from a federal policy perspective, we want to produce 100 percent of the electricity clean by 2035. That is an expected goal, but it’s all happening.”

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