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Optical management in organic photovoltaic devices

Carbon Energy 2021年第1期3卷 4-23页

作者： Cheng Yang Chao Zhao Yang Sun Qicong Li MdRasidul Islam Kong Liu Zhijie Wang Shengchun Qu Zhanguo Wang Key Laboratory of Semiconductor Materials Science Beijing Key Laboratory of Low Dimensional Semiconductor Materials and DevicesInstitute of SemiconductorsChinese Academy of SciencesBeijingChina Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijingChina

Due to their potentials in light‐weight,flexible,and semitransparent devices,organic photovoltaics are of great significance in the field of renewable energy.However,the narrow intrinsic absorption spectrum of organic materials hinders the full utilization of solar energy.To fabricate a highly efficient opaque solar cell,it is greatly necessary to modify the optical properties of the device to improve light absorption.In addition,the growing interest in building‐integrated photovoltaics drives the development of semitransparent devices.The preparation of semitransparent solar cells with excellent performance imposes high requirements on the high efficiency and appropriate visible light transmittance of effective optical management.In this review,the recent research progress of optical management in organic photovoltaics is reviewed,including the design of light‐absorbing materials,the modification of different layers,adding a lighttrapping structure,and changing the light absorption capabilities of specific materials,so as to provide strategies of how to improve the performance of organic photovoltaic devices and present the prospect of the area.

关键词： light absorption light transmittance light trapping organic photovoltaic devices

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Enhanced performance in organic photovoltaic devices with a KMnO_4 solution treated indium tin oxide anode modification

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Chinese Physics B 2012年第12期21卷 526-530页

作者：杨倩倩赵谡玲徐征张福俊闫光孔超樊星张妍斐徐叙瑢 Key Laboratory of Luminescence and Optical Information(Beijing Jiaotong University) Ministry of Education Institute of Optoelectronics Technology Beijing Jiaotong University

The properties of poly（3-hexylthiophene）：（6,6）-phenyl C61 butyric acid methyl ester （P3HT：PCBM） organic pho- tovoltaic devices （OPVs） with an indium tin oxide （ITO） anode treated by a KMnO4 solution are investigated. The optimized KMnO4 solution has a concentration of 50 rag/L, and ITO is treated for 15 min. The modification of ITO anode results in an enhancement of the power conversion efficiency （PCE） of the device, which is responsible for the increase of the photocurrent. The performance enhancement is attributed to the work function modification of the ITO substrate through the strong oxygenation of KMnO4, and then the charge collection efficiency is improved.

关键词： organic photovoltaic devices indium tin oxide anode modification KMnO4

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UV-ozone-treated MoO_3 as the hole-collecting buffer layer for high-efficiency solution-processed SQ:PC_(71) BM photovoltaic devices

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Chinese Physics B 2014年第3期23卷 608-612页

作者：杨倩倩杨道宾赵谡玲黄艳徐征龚伟樊星刘志方黄清雨徐叙瑢 Key Laboratory of Luminescence and Optical Information (Beijing Jiaotong University) Ministry of Education Institute of Optoelectronics Technology Beijing Jiaotong University College of Chemistry Sichuan University

The enhanced performance of a squaraine compound, with 2,4-bis[4-（N,N-diisobutylamino）-2,6-dihydroxyphenyl] squaraine as the donor and [6,6]-phenyl-C71-butyric acid methyl ester （PC71BM） as the acceptor, in solution-processed or- ganic photovoltaic devices is obtained by using UV-ozone-treated MoO3 as the hole-collecting buffer layer. The optimized thickness of the MoO3 layer is 8 nm, at which the device shows the best power conversion efficiency （PCE） among all devices, resulting from a balance of optical absorption and charge transport. After being treated by UV-ozone for 10 min, the transmittance of the MoO3 film is almost unchanged. Atomic force microscopy results show that the treated surface morphology is improved. A high PCE of 3.99% under AM 1.5 G illumination （100 mW/cm2） is obtained.

关键词： organic photovoltaic devices hole-collecting buffer layer MOO3 UV-ozone

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