A Controllable Fabrication of Grain Boundary PbI_2 Nanoplates Passivated Lead Halide Perovskites for High Performance Solar Cells
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- 英文论文题名：A Controllable Fabrication of Grain Boundary PbI_2 Nanoplates Passivated Lead Halide Perovskites for High Performance Solar Cells
- 论文作者：Taiyang Zhang ; Nanjie Guo ; Ge Li ; Xufang Qian ; Yixin Zhao
- 英文论文作者：Taiyang Zhang ; Nanjie Guo ; Ge Li ; Xufang Qian ; Yixin Zhao ; School of Environmental Science and Engineering ; Shanghai Jiao Tong University
- 年：2017
- 作者机构：School of Environmental Science and Engineering, Shanghai Jiao Tong University;
- 英文论文关键词：Perovskite ; CH3NH3PbI2Br ; CH3NH3PbI3 ; PbI2 Passivation
- 会议召开时间：2017-05-27
- 会议录名称：第四届新型太阳能电池学术研讨会论文集
- 英文会议录名称：Abstract Book of the 4th Conference on New Generation Solar Cells
- 语种：英文
- 分类号：TM914.4
- 学会代码：ZKYQ
- 会议名称：第四届新型太阳能电池学术研讨会
- 会议地点：中国北京
- 主办单位：中国可再生能源学会光化学专业委员会
- 学会名称：中国科学院物理研究所清洁能源实验室
- 页数：1
- 文件大小：645k
- 原文格式：D
- 会议级别：全国
摘要
We demonstrate a controllable formation of grain boundary PbI_2 nanoplates passivated CH_3NH_3PbI_3 and CH_3NH_3PbI_2Br perovskites for high performance solar cells with up to 17.8% and 14.4% efficiencies, which are higher than the corresponding phase pure perovskite solar cells.The PbI_2 passivated planar perovskite films were facilely prepared via direct gas/solid reaction of hydrohalide deficient PbI_2·x HI/Br precursor with CH_3NH_2 gas.The amount of PbI_2 impurities can be controlled by adjusting the hydrohalide deficiency in the precursors.The crystal growth investigation suggested that the PbI_2 is highly like to form during the annealing crystallization process instead of existing in either the PbI_2·xH I/Br precursor films or as grown perovskite films.The PbI_2 with controllable amount locating at grain boundary could effectively passivate the perovskites with a longer PL lifetime and enhanced V_(oc).
We demonstrate a controllable formation of grain boundary PbI_2 nanoplates passivated CH_3NH_3PbI_3 and CH_3NH_3PbI_2Br perovskites for high performance solar cells with up to 17.8% and 14.4% efficiencies, which are higher than the corresponding phase pure perovskite solar cells.The PbI_2 passivated planar perovskite films were facilely prepared via direct gas/solid reaction of hydrohalide deficient PbI_2·x HI/Br precursor with CH_3NH_2 gas.The amount of PbI_2 impurities can be controlled by adjusting the hydrohalide deficiency in the precursors.The crystal growth investigation suggested that the PbI_2 is highly like to form during the annealing crystallization process instead of existing in either the PbI_2·xH I/Br precursor films or as grown perovskite films.The PbI_2 with controllable amount locating at grain boundary could effectively passivate the perovskites with a longer PL lifetime and enhanced V_(oc).
We demonstrate a controllable formation of grain boundary PbI_2 nanoplates passivated CH_3NH_3PbI_3 and CH_3NH_3PbI_2Br perovskites for high performance solar cells with up to 17.8% and 14.4% efficiencies, which are higher than the corresponding phase pure perovskite solar cells.The PbI_2 passivated planar perovskite films were facilely prepared via direct gas/solid reaction of hydrohalide deficient PbI_2·x HI/Br precursor with CH_3NH_2 gas.The amount of PbI_2 impurities can be controlled by adjusting the hydrohalide deficiency in the precursors.The crystal growth investigation suggested that the PbI_2 is highly like to form during the annealing crystallization process instead of existing in either the PbI_2·xH I/Br precursor films or as grown perovskite films.The PbI_2 with controllable amount locating at grain boundary could effectively passivate the perovskites with a longer PL lifetime and enhanced V_(oc).
引文
[1]T.Zhang,N.Guo,G.Li,X.Qian,Y.Zhao,Nano Energy 2016,26,50.