Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Hamid Mehrvarz"'
Autor:
Daniel L. Lepkowski, Stephen Bremner, Jacob T. Boyer, Tyler J. Grassman, Hamid Mehrvarz, Mattias K. Juhl, Udo Römer, Zak H. Blumer, Anastasia Soeriyadi, Chuqi Yi, Tal Kasher, Steven A. Ringel, Anita Ho-Baillie
Publikováno v:
2021 IEEE 48th Photovoltaic Specialists Conference (PVSC).
Historically, the performance of monolithically-integrated GaAsP/Si tandem solar cells has been limited by the presence of elevated TDD in the GaAsP subcell. However, our recent development of low-TDD GaAsP/Si virtual substrates has greatly improved
Autor:
Steven A. Ringel, Daniel Derkacs, Zak H. Blumer, Stephen Bremner, Anita Ho-Baillie, Chuqi Yi, Anastasia Soeriyadi, Daniel L. Lepkowski, Alex Stavrides, Tyler J. Grassman, Mattias K. Juhl, Chris Kerestes, Jacob T. Boyer, Hamid Mehrvarz
Publikováno v:
2020 47th IEEE Photovoltaic Specialists Conference (PVSC).
Detailed loss analysis of our previously reported 21.8% (unverified) monolithic GaAsP/Si tandem cells has identified and quantified three main mechanisms limiting cell performance: dislocation mediated voltage and current losses, improper bandgap pro
Autor:
Stephen Bremner, Fa-Jun Ma, Anita Ho-Baillie, Hidenori Mizuno, Takeyoshi Sugaya, Kikuo Makita, Chuqi Yi, Hidetaka Takato, Hamid Mehrvarz
Publikováno v:
Optics express. 28(3)
Silicon based multi-junction solar cells are a promising approach for achieving high power conversion efficiencies using relatively low-cost substrates. In recent years, 2-terminal triple-junction solar cells using GaInP/GaAs as top cells and Si bott
Autor:
Yongyoon Cho, Long Hu, Jianghui Zheng, Anita Ho-Baillie, Shujuan Huang, Hamid Mehrvarz, Meng Zhang, Xiaofan Deng, Xin Cui, Da Seul Lee, Cho Fai Jonathan Lau, Fa-Jun Ma, Yajie Jiang, Martin A. Green, Jueming Bing, Chao Chen, Anastasia Soeriyadi, Jincheol Kim
Publikováno v:
Energy & Environmental Science. 11:2432-2443
Monolithic perovskite/silicon tandem solar cells show great promise for further efficiency enhancement for current silicon photovoltaic technology. In general, an interface (tunnelling or recombination) layer is usually required for electrical contac
Autor:
Hamid Mehrvarz, Anastasia Soeriyadi, Stephen Bremner, Christopher Kerestes, Anita Ho-Baillie, Daniel L. Lepkowski, Ned J. Western, Steven Whipple, Alex Stavrides, Tyler J. Grassman, Mattias K. Juhl, Daniel Derkacs, Steven A. Ringel, Jacob T. Boyer, Udo Römer, Daniel J. Chmielewski, Chuqi Yi
Publikováno v:
Solar Energy Materials and Solar Cells. 230:111299
A 2-terminal, dual-junction, epitaxially integrated, GaAsP/Si tandem solar cell with an 3rd party certified efficiency of 23.4 % was fabricated via MOCVD growth on an ex-situ produced Si sub cell. The drastic efficiency improvement over the authors p
Autor:
Daniel L. Lepkowski, Tyler J. Grassman, Alex Stavrides, Jacob T. Boyer, Daniel Derkacs, Stephen Bremner, Ned J. Western, Steven Whipple, Steven A. Ringel, Daniel J. Chmielewski, Christopher Kerestes, Hamid Mehrvarz, Chuqi Yi, Anita Ho-Baillie
Publikováno v:
2019 IEEE 46th Photovoltaic Specialists Conference (PVSC).
We report here on progress made in the development of >20% efficient monolithic epitaxial III-V/Si tandem solar cells. Following our prior demonstration of a GaAs0.75P0.25/Si tandem cell with verified AM1.5G efficiency of 20.1%, we have undertaken in
Autor:
Jueming Bing, Hamid Mehrvarz, Meng Zhang, Xin Cui, Anita Ho-Baillie, Cho Fai Jonathan Lau, Laura Granados Caro, Yong Li, Yang Li, Shujuan Huang, Shi Tang, Chao Chen, Yongyoon Cho, Vinicius R. Gonçales, Da Seul Lee, Jincheol Kim, Jianghui Zheng, Chwenhaw Liao
Publikováno v:
SSRN Electronic Journal.
UV induced degradation is a big issue for perovskite-based solar cells. Parasitic ultraviolet (UV) absorption by the “sun-facing” carrier transport layer in a perovskite cell also hinders the electrical performance when the cell is a top cell for
Autor:
Martin A. Green, Ibraheem Almansouri, Hamid Mehrvarz, John A. Carlin, Steven A. Ringel, Xiaojing Hao, Tyler J. Grassman, Stephen Bremner, Alexander Haas, Anita Ho-Baillie, Gavin Conibeer
Publikováno v:
IEEE Journal of Photovoltaics. 5:683-690
We report on efforts to design high-efficiency silicon homojunction subcells for use in multijunction stack devices. Both simulation and experimental works have been performed looking at a silicon solar cell under a truncated spectrum below 1.5 eV fi
Publikováno v:
Solar Energy Materials and Solar Cells. 122:208-216
Plasmonics is an emerging area of study for photovoltaic applications. The last decade has seen an increasing interest in the application of metal nanoparticles (MNP) on the surface of solar cells to scatter light and subsequently achieve light trapp
Autor:
Fa-Jun Ma, Jianghui Zheng, Cho Fai Jonathan Lau, Anita Ho-Baillie, Hamid Mehrvarz, Shujuan Huang, Martin A. Green
Publikováno v:
ACS Energy Letters. 3:2299-2300
A monolithic (FAPbI3)0.83(MAPbBr3)0.17 perovskite/rear-textured-homo-junction-silicon tandem solar cell with a steady-state 21.8% efficiency has been achieved on 16 cm2 using a new front top metal grid design producing an impressive fill factor (76%