目前,在高效率钙钛矿太阳能电池(perovskite solar cells, PSCs)中,金、银等贵金属对电极和昂贵的空穴传输材料已成为标配,导致电池成本较高,严重阻碍了钙钛矿太阳能电池的推广与发展,开发价格低廉的对电极及空穴传输材料迫在眉睫.碳材...目前,在高效率钙钛矿太阳能电池(perovskite solar cells, PSCs)中,金、银等贵金属对电极和昂贵的空穴传输材料已成为标配,导致电池成本较高,严重阻碍了钙钛矿太阳能电池的推广与发展,开发价格低廉的对电极及空穴传输材料迫在眉睫.碳材料具有价格低廉、化学性质稳定、导电性好、空穴提取能力强等优点,近年来以其作为无空穴传输层钙钛矿太阳能电池对电极的研究取得了一定的成果.本文介绍了碳基无空穴传输层钙钛矿太阳能电池的器件结构及工作原理,并以碳材料种类为划分依据,分别综述了石墨/炭黑、碳纳米管、导电碳浆、碳墨、石墨烯等多种碳材料作为钙钛矿太阳能电池对电极的研究进展,指出现有研究工作中存在的局限性,并简要说明该领域未来的发展方向.展开更多
We demonstrate hole-transport-layer-free light-emitting diodes(LEDs) based on solution-processed multiple-quantum-well(MQW) perovskite. The MQW perovskite can self-assemble to a unique structure of vertically graded d...We demonstrate hole-transport-layer-free light-emitting diodes(LEDs) based on solution-processed multiple-quantum-well(MQW) perovskite. The MQW perovskite can self-assemble to a unique structure of vertically graded distribution with two-dimensional layered perovskite covered by three-dimensionallike perovskite at top, which can naturally form a barrier of electron transporting to the anode interface,thereby enhancing the charge capture efficiency. This leads to hole-transport-layer-free MQW perovskite LEDs reaching an external quantum efficiency(EQE) of 9.0% with emission peak at 528 nm, which is over6 times of LEDs based on three-dimensional perovskite with the same device structure, representing the record EQE of hole-transport-layer-free perovskite LED.展开更多
文摘目前,在高效率钙钛矿太阳能电池(perovskite solar cells, PSCs)中,金、银等贵金属对电极和昂贵的空穴传输材料已成为标配,导致电池成本较高,严重阻碍了钙钛矿太阳能电池的推广与发展,开发价格低廉的对电极及空穴传输材料迫在眉睫.碳材料具有价格低廉、化学性质稳定、导电性好、空穴提取能力强等优点,近年来以其作为无空穴传输层钙钛矿太阳能电池对电极的研究取得了一定的成果.本文介绍了碳基无空穴传输层钙钛矿太阳能电池的器件结构及工作原理,并以碳材料种类为划分依据,分别综述了石墨/炭黑、碳纳米管、导电碳浆、碳墨、石墨烯等多种碳材料作为钙钛矿太阳能电池对电极的研究进展,指出现有研究工作中存在的局限性,并简要说明该领域未来的发展方向.
基金financially supported by the Major Research Plan of the National Natural Science Foundation of China (No.91733302)the National Natural Science Foundation of China (Nos.61875084,61922041,61961160733,61974126,51902273)+4 种基金the National Science Fund for Distinguished Young Scholars (No.61725502)the Natural Science Foundation of Jiangsu Province,China (No.BK20180085)the Major Program of Natural Science Research of Jiangsu Higher Education Institutions of China (No.19KJA520004)the Joint Research Funds of the Department of Science & Technology of Shaanxi Province and NPU (No.2020GXLH-Z-024)the Synergetic Innovation Center for Organic Electronics and Information Displays,a part of this research was undertaken on the SAXS/WAXS beamline at the Australian Synchrotron。
文摘We demonstrate hole-transport-layer-free light-emitting diodes(LEDs) based on solution-processed multiple-quantum-well(MQW) perovskite. The MQW perovskite can self-assemble to a unique structure of vertically graded distribution with two-dimensional layered perovskite covered by three-dimensionallike perovskite at top, which can naturally form a barrier of electron transporting to the anode interface,thereby enhancing the charge capture efficiency. This leads to hole-transport-layer-free MQW perovskite LEDs reaching an external quantum efficiency(EQE) of 9.0% with emission peak at 528 nm, which is over6 times of LEDs based on three-dimensional perovskite with the same device structure, representing the record EQE of hole-transport-layer-free perovskite LED.
