Y
Yifei Zhang
Researcher at Massachusetts Institute of Technology
Publications - 73
Citations - 4286
Yifei Zhang is an academic researcher from Massachusetts Institute of Technology. The author has contributed to research in topics: Photonics & Perovskite (structure). The author has an hindex of 22, co-authored 62 publications receiving 2500 citations. Previous affiliations of Yifei Zhang include Peking University.
Papers
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Journal ArticleDOI
Enhanced photovoltage for inverted planar heterojunction perovskite solar cells
Deying Luo,Wenqiang Yang,Zhiping Wang,Aditya Sadhanala,Qin Hu,Rui Su,Ravichandran Shivanna,Gustavo F. Trindade,John F. Watts,Zhaojian Xu,Tanghao Liu,Ke Chen,Fengjun Ye,Pan Wu,Lichen Zhao,Jiang Wu,Yongguang Tu,Yifei Zhang,Xiao-Yu Yang,Wei Zhang,Richard H. Friend,Qihuang Gong,Qihuang Gong,Henry J. Snaith,Rui Zhu,Rui Zhu +25 more
TL;DR: This approach produces a wider bandgap top layer and a more n-type perovskite film, which mitigates nonradiative recombination, leading to an increase in Voc by up to 100 millivolts, which led to a stabilized power output approaching 21% at the maximum power point.
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Broadband transparent optical phase change materials for high-performance nonvolatile photonics.
Yifei Zhang,Jeffrey B. Chou,Junying Li,Huashan Li,Qingyang Du,Anupama Yadav,Si Zhou,Mikhail Y. Shalaginov,Zhuoran Fang,Huikai Zhong,Christopher Roberts,Paul Robinson,Bridget Bohlin,Carlos Ríos,Hongtao Lin,Myungkoo Kang,Tian Gu,Jamie H. Warner,Vladimir Liberman,Kathleen Richardson,Juejun Hu +20 more
TL;DR: In this paper, a new class of optical phase change materials (O-PCM) based on Ge-Sb-Se-Te (GSST) was proposed to break the coupling between refractive index and optical loss allowing low loss performance benefits.
Journal ArticleDOI
Electrically reconfigurable non-volatile metasurface using low-loss optical phase-change material.
Yifei Zhang,Clayton Fowler,Junhao Liang,Bilal Azhar,Mikhail Y. Shalaginov,Skylar Deckoff-Jones,Sensong An,Jeffrey B. Chou,Christopher Roberts,Vladimir Liberman,Myungkoo Kang,Carlos Ríos,Kathleen Richardson,Clara Rivero-Baleine,Tian Gu,Hualiang Zhang,Juejun Hu +16 more
TL;DR: In this paper, a large-scale, electrically reconfigurable non-volatile active metasurface platform based on optical phase change materials (PCMs) is presented.
Journal ArticleDOI
Broadband nonvolatile photonic switching based on optical phase change materials: beyond the classical figure-of-merit
TL;DR: A broadband, nonvolatile on-chip switch design in the telecommunication C-band with record low loss and crosstalk and a nonperturbative design that enables low-loss device operation beyond the classical figure-of-merit (FOM) limit is proposed.
Journal ArticleDOI
Charge-carrier balance for highly efficient inverted planar heterojunction perovskite solar cells
Ke Chen,Qin Hu,Qin Hu,Tanghao Liu,Lichen Zhao,Deying Luo,Jiang Wu,Yifei Zhang,Wei Zhang,Feng Liu,Feng Liu,Thomas P. Russell,Thomas P. Russell,Rui Zhu,Rui Zhu,Qihuang Gong,Qihuang Gong +16 more
TL;DR: The charge carrier balance strategy by interface engineering was employed to optimize carrier transport in the planar heterojunction perovskite solar cells, leading to high power conversion efficiency and stabilized output efficiency.