Search Results - "Yang, Mengjin"

Controllable Sequential Deposition of Planar CH3NH3PbI3 Perovskite Films via Adjustable Volume Expansion by Zhang, Taiyang, Yang, Mengjin, Zhao, Yixin, Zhu, Kai

“…We demonstrate a facile morphology-controllable sequential deposition of planar CH3NH3PbI3 (MAPbI3) film by using a novel volume-expansion-adjustable PbI2·xMAI…”
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Long-range hot-carrier transport in hybrid perovskites visualized by ultrafast microscopy by Guo, Zhi, Wan, Yan, Yang, Mengjin, Snaider, Jordan, Zhu, Kai, Huang, Libai

“…The Shockley-Queisser limit for solar cell efficiency can be overcome if hot carriers can be harvested before they thermalize. Recently, carrier cooling time…”
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Stabilizing Perovskite Structures by Tuning Tolerance Factor: Formation of Formamidinium and Cesium Lead Iodide Solid-State Alloys by Li, Zhen, Yang, Mengjin, Park, Ji-Sang, Wei, Su-Huai, Berry, Joseph J, Zhu, Kai

“…Goldschmidt tolerance factor (t) is an empirical index for predicting stable crystal structures of perovskite materials. A t value between 0.8 and 1.0 is…”
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Impact of grain boundaries on efficiency and stability of organic-inorganic trihalide perovskites by Chu, Zhaodong, Yang, Mengjin, Schulz, Philip, Wu, Di, Ma, Xin, Seifert, Edward, Sun, Liuyang, Li, Xiaoqin, Zhu, Kai, Lai, Keji

“…Organic–inorganic perovskite solar cells have attracted tremendous attention because of their remarkably high power conversion efficiencies. To further improve…”
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Exceptional Morphology-Preserving Evolution of Formamidinium Lead Triiodide Perovskite Thin Films via Organic-Cation Displacement by Zhou, Yuanyuan, Yang, Mengjin, Pang, Shuping, Zhu, Kai, Padture, Nitin P

“…Here we demonstrate a radically different chemical route for the creation of HC­(NH2)2PbI3 (FAPbI3) perovskite thin films. This approach entails a simple…”
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Low surface recombination velocity in solution-grown CH3NH3PbBr3 perovskite single crystal by Yang, Ye, Yan, Yong, Yang, Mengjin, Choi, Sukgeun, Zhu, Kai, Luther, Joseph M., Beard, Matthew C.

“…Organic-inorganic hybrid perovskites are attracting intense research effort due to their impressive performance in solar cells. While the carrier transport…”
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Comparison of Recombination Dynamics in CH3NH3PbBr3 and CH3NH3PbI3 Perovskite Films: Influence of Exciton Binding Energy by Yang, Ye, Yang, Mengjin, Li, Zhen, Crisp, Ryan, Zhu, Kai, Beard, Matthew C.

“…Understanding carrier recombination in semiconductors is a critical component when developing practical applications. Here we measure and compare the…”
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Facile fabrication of large-grain CH3NH3PbI3−xBrx films for high-efficiency solar cells via CH3NH3Br-selective Ostwald ripening by Yang, Mengjin, Zhang, Taiyang, Schulz, Philip, Li, Zhen, Li, Ge, Kim, Dong Hoe, Guo, Nanjie, Berry, Joseph J., Zhu, Kai, Zhao, Yixin

“…Organometallic halide perovskite solar cells (PSCs) have shown great promise as a low-cost, high-efficiency photovoltaic technology. Structural and…”
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Impact of Capacitive Effect and Ion Migration on the Hysteretic Behavior of Perovskite Solar Cells by Chen, Bo, Yang, Mengjin, Zheng, Xiaojia, Wu, Congcong, Li, Wenle, Yan, Yongke, Bisquert, Juan, Garcia-Belmonte, Germà, Zhu, Kai, Priya, Shashank

“…In the past five years, perovskite solar cells (PSCs) based on organometal halide perovskite have exhibited extraordinary photovoltaic (PV) performance…”
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Acid Additives Enhancing the Conductivity of Spiro‐OMeTAD Toward High‐Efficiency and Hysteresis‐Less Planar Perovskite Solar Cells by Li, Zhen, Tinkham, Jonathan, Schulz, Philip, Yang, Mengjin, Kim, Dong Hoe, Berry, Joseph, Sellinger, Alan, Zhu, Kai

“…A general doping strategy, using a wide range of acids with different pKa values as additive, is demonstrated to enhance the conductivity of spiro‐OMeTAD, the…”
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Defect Tolerance in Methylammonium Lead Triiodide Perovskite by Steirer, K. Xerxes, Schulz, Philip, Teeter, Glenn, Stevanovic, Vladan, Yang, Mengjin, Zhu, Kai, Berry, Joseph J

“…Photovoltaic applications of perovskite semiconductor material systems have generated considerable interest in part because of predictions that primary defect…”
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Divalent Anionic Doping in Perovskite Solar Cells for Enhanced Chemical Stability by Gong, Jue, Yang, Mengjin, Rebollar, Dominic, Rucinski, Jordan, Liveris, Zachary, Zhu, Kai, Xu, Tao

“…The chemical stabilities of hybrid perovskite materials demand further improvement toward long‐term and large‐scale photovoltaic applications. Herein, the…”
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300% Enhancement of Carrier Mobility in Uniaxial‐Oriented Perovskite Films Formed by Topotactic‐Oriented Attachment by Kim, Dong Hoe, Park, Jaehong, Li, Zhen, Yang, Mengjin, Park, Ji‐Sang, Park, Ik Jae, Kim, Jin Young, Berry, Joseph J., Rumbles, Garry, Zhu, Kai

“…Organic–inorganic perovskites with intriguing optical and electrical properties have attracted significant research interests due to their excellent…”
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Electron and hole drift mobility measurements on methylammonium lead iodide perovskite solar cells by Maynard, Brian, Long, Qi, Schiff, Eric A., Yang, Mengjin, Zhu, Kai, Kottokkaran, Ranjith, Abbas, Hisham, Dalal, Vikram L.

“…We report nanosecond domain time-of-flight measurements of electron and hole photocarriers in methylammonium lead iodide perovskite solar cells. The mobilities…”
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Transformative Evolution of Organolead Triiodide Perovskite Thin Films from Strong Room-Temperature Solid–Gas Interaction between HPbI3‑CH3NH2 Precursor Pair by Pang, Shuping, Zhou, Yuanyuan, Wang, Zaiwei, Yang, Mengjin, Krause, Amanda R, Zhou, Zhongmin, Zhu, Kai, Padture, Nitin P, Cui, Guanglei

“…We demonstrate the feasibility of a nonsalt-based precursor pairinorganic HPbI3 solid and organic CH3NH2 gasfor the deposition of uniform CH3NH3PbI3…”
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Top and bottom surfaces limit carrier lifetime in lead iodide perovskite films by Yang, Ye, Yang, Mengjin, Moore, David T., Yan, Yong, Miller, Elisa M., Zhu, Kai, Beard, Matthew C.

“…Carrier recombination at defects is detrimental to the performance of solar energy conversion systems, including solar cells and photoelectrochemical devices…”
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Large polarization-dependent exciton optical Stark effect in lead iodide perovskites by Yang, Ye, Yang, Mengjin, Zhu, Kai, Johnson, Justin C., Berry, Joseph J., van de Lagemaat, Jao, Beard, Matthew C.

“…A strong interaction of a semiconductor with a below-bandgap laser pulse causes a blue-shift of the bandgap transition energy, known as the optical Stark…”
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Progress in light harvesting and charge injection of dye-sensitized solar cells by Lee, Jung-Kun, Yang, Mengjin

“…• Major components of DSSCs such as the oxide semiconductor film, sensitizing dyes, electrolytes, and TCO are reviewed. • The electrical, optical, and chemical…”
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Carrier separation and transport in perovskite solar cells studied by nanometre-scale profiling of electrical potential by Jiang, Chun-Sheng, Yang, Mengjin, Zhou, Yuanyuan, To, Bobby, Nanayakkara, Sanjini U., Luther, Joseph M., Zhou, Weilie, Berry, Joseph J., van de Lagemaat, Jao, Padture, Nitin P., Zhu, Kai, Al-Jassim, Mowafak M.

“…Organometal–halide perovskite solar cells have greatly improved in just a few years to a power conversion efficiency exceeding 20%. This technology shows…”
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Controlled Humidity Study on the Formation of Higher Efficiency Formamidinium Lead Triiodide-Based Solar Cells by Wozny, Sarah, Yang, Mengjin, Nardes, Alexandre M, Mercado, Candy C, Ferrere, Suzanne, Reese, Matthew O, Zhou, Weilie, Zhu, Kai

“…We report on the effect of humidity on the structural, optical, and electrical properties of formamidinium lead halide perovskite (FAPbI3; prepared by a…”
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