Swift Solar is building the next generation of solar technology

Perovskite solar cells are about to change the future of renewable energy generation


Sam Stranks Ted Talk

Perovskite technology enables efficient, lightweight, low-cost photovoltaics

Highest power-to-weight ratio

Due to the strong absorbing power and great efficiency perovskite solar cells can achieve unmatched power-to-weight ratios

Lightweight and flexible

New form factors for lightweight solar modules are enabled by the ultra-thin material

Abundant and cheap materials

The raw materials for perovskites are produced in high-volume at extremely low cost

Absorb different wavelength ranges

The materials can be engineered to absorb in different ranges of the solar spectrum, therefore allowing for new applications

Perovskite solar cells

About us

Swift Solar is a U.S. startup designing and manufacturing lightweight solar panels that are cheaper and more efficient than conventional panels. 

The Swift Solar team includes leading solar technologists from Stanford, MIT, Cambridge, Oxford, and the University of Washington, with deep expertise in perovskite photovoltaic technology and scale-up. Swift’s core technologies range from new solar cell architectures to specialized manufacturing techniques initially developed in the labs at Stanford and MIT.

Founding Team

Joel Jean

Joel Jean

Joel is a co-founder of Swift Solar and a strong advocate for climate change action. He enjoys running marathons and buys new books faster than he can read them. Prior to joining Swift, Joel served as Executive Director of the Tata-MIT GridEdge Solar research program, which focuses on scale-up of new solar photovoltaic technologies for India and other developing countries. As a researcher and NSF Fellow at MIT, he developed ultra-lightweight and flexible solar cells that were recognized by the Katerva Award in 2017. He co-authored the MIT Future of Solar Energy Study and has worked extensively on emerging PV materials and devices, techno-economic analysis, and energy and climate policy. Joel holds a PhD and SM in electrical engineering from MIT and a BS with distinction from Stanford University.
Tomas Leijtens

Tomas Leijtens

Tomas is a co-founder of Swift Solar and has been working on a renewable energy future since making hydrogen fuel in teapots at home at age 15. After taking Swift Solar to large-scale commercial success, Tomas plans to join the Dutch national soccer team to bring them back to their former glory. After receiving a BSc with honors in Chemical Engineering from Stanford University, Tomas completed his PhD at the University of Oxford. There, he worked to improve the reliability of perovskite solar cells since their inception in 2012. He joined Stanford as a Marie Curie Fellow in 2015, where he developed the first all-perovskite tandem photovoltaic technology with Giles Eperon and Kevin Bush. He recently joined the National Renewable Energy Laboratory in Golden, CO as a research scientist. His academic work has led to >45 publications with >10,000 citations. He was named a Forbes 30 under 30 Fellow in Science and was recognized as an “Emerging Investigator” by the Journal of Materials Chemistry in 2017.
Kevin Bush

Kevin Bush

Kevin is a co-founder of Swift Solar and is our super talented jack-of-all-trades. Prior to joining Swift, Kevin designed and built biogas digestion systems, a remote-controlled amphibious vehicle, a biodiesel-powered ramjet engine, and a 10-foot rocket. Somewhere along the way, he became deeply passionate about climate change and renewable energy, leading him to pursue a PhD in Materials Science. There, as a researcher and NSF Fellow, he led the development of record-efficiency perovskite-on-silicon tandems and assisted in the fabrication of the first all-perovskite tandems. Kevin holds a Master’s and PhD in Materials Science and Engineering from Stanford University and a Bachelor’s in Mechanical Engineering from Vanderbilt University, graduating summa cum laude.
Giles Eperon

Giles Eperon

Giles is a co-founder of Swift Solar. When he’s not in the lab working on his passion for solar power and a sustainable future, he can normally be found climbing a rock, mountain or sheet of ice. Giles received an MSc in Physics from the University of Bristol, and subsequently joined Sharp Laboratories of Europe as a graduate researcher. During two years at Sharp, Giles worked on a variety of electronic and optoelectronic device research, finding his passion for solar power along the way there. He thus took the controversial step of going back to grad school and pursued a PhD at the University of Oxford. There, he worked on perovskite solar cells since their inception in 2012 and developed new materials and device architectures. He joined the University of Washington in 2016, gaining a joint Marie Curie fellowship with the University of Cambridge, where he continued his work on all-perovskite tandems in collaboration with colleagues at Stanford and Oxford. He recently joined the National Renewable Energy Laboratory in CO as a staff scientist. Giles’ work has been published over 70 times, garnering over 19,000 citations. Giles was named a 2016 Forbes ’30 under 30’ fellow in Energy and one of Clarivate’s 2017 Highly Cited Researchers.
Max Hoerantner

Max Hoerantner

Max is a co-founder of Swift Solar and is driven by the motivation to solve the problems and inefficiencies around us and is happy whenever surrounded by water to swim in or sail on. He is a passionate engineer and gets excited about complex machines and beautiful designs. Max received his BSc and MSc in Mechanical Engineering with a focus on renewable energy technologies from ETH Zurich, where he built robots and an electric car that would outpace a Tesla. To dive deeper into the science of solar cells he obtained a PhD in Physics from the University of Oxford, where he worked in the group of Henry Snaith and was supported by a studentship from Oxford Photovoltaics. During his PhD he started a non-profit to install PV systems on rural Indian schools and co-developed a platform to share research protocols. With coding being his second passion, he participated and won prizes at several hackathons across Europe. Prior to joining Swift, he was a post-doc at MIT and joined the Tata-MIT GridEdge Solar research program to lead the manufacturing efforts and scale up perovskite solar cells for the Indian market.
Sam Stranks

Sam Stranks

Sam is a co-founder of Swift Solar and is Lead Scientific Advisor. An avid traveler, sports fanatic and father of two, he is passionate about new technologies and solving energy and climate change issues. Sam is a TED Fellow, Royal Society Research Fellow and Principal Investigator at the University of Cambridge leading a group focusing on transformative electronics applications. He holds a BA and BSc from the University of Adelaide and PhD from the University of Oxford, which he completed as a Rhodes Scholar. From 2014-2016, he was a post-doctoral researcher in Henry Snaith’s group at Oxford where he was also a Junior Research Fellow at Worcester College, before spending 2 years as a Marie Curie Fellow at MIT. For his seminal contributions to the field of hybrid perovskites, Sam received the 2016 IUPAP Young Scientist in Semiconductor Physics Prize, the 2017 Early Career Prize by the European Physical Society and the 2018 Henry Moseley Prize and Medal from the Institute of Physics. In 2017, he was named by the MIT Technology Review as one of the 35 under 35 innovators in Europe and was recently listed by Clarivate Analytics as the seventh most influential researchers in the world through highly cited papers.

Careers – Build the future of solar

Swift Solar is assembling a world-class team to build a world-class company. Therefore we look for growth-minded people who value hard work, curiosity, and inclusiveness.

Swift is proud to be an equal opportunity workplace.


Swift Solar is currently based in Golden (CO) and Redwood City (CA).

Swift Solar Inc.