基于有机金属卤化物钙钛矿纳米网和纳米碗阵列的高性能光探测器
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- 英文论文题名：High-Performance Photodetectors Based on Organometal Halide Perovskite Nanonets and Nanobowl Arrays
- 论文作者：王文慧 ; 齐利民
- 英文论文作者：Wenhui Wang ; Limin Qi ; College of Chemistry ; Peking University
- 年：2016
- 作者机构：北京大学化学与分子工程学院;
- 论文关键词：钙钛矿 ; 纳米网 ; 纳米碗阵列 ; 光检测器
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第三十一分会：胶体与界面化学
- 语种：中文
- 分类号：TN15;TB383.1
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第三十一分会 ; 胶体与界面化学
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：260k
- 原文格式：D
- 会议级别：全国
摘要
有机金属卤化物钙钛矿(OHP)作为一种光捕获材料近年来引起了广泛关注,它具有高的吸光系数、长的载流子扩散长度等特点~([1,2])。基于OHP材料的光检测器表现出灵敏度高以及响应时间短等优势。OHP材料的形貌以及结晶性在器件性能中起关键作用。但是,其低的热稳定性、铅盐与胺盐的快速反应以及微量水导致的分解使得OHP材料的形貌调控具有挑战性~([3])。我们利用胶体球刻蚀方法,以单层胶体晶体为模板制备了OHP纳米网及纳米碗阵列。平整的硅基底上可以得到纳米网,而粗糙的FTO基底上能得到纳米碗阵列。用纳米网及纳米碗阵列制备的光检测器表现出了优异的光电性能。其中OHP纳米网具有高的灵敏度(10.33A/W,700nm单色光强度28μW/cm~2),是平面膜结构的6倍。由于其独特的二维阵列结构,OHP纳米网及纳米碗能够提供多重散射中心从而具有增强的光捕获能力,并且胶体晶体模板为OHP晶体的生长提供了限域空间,使其具有更好的结晶性。此外,OHP纳米网及纳米碗阵列具有二维光子晶体的特性,呈现出鲜亮的颜色。
Organometal halide perovskites(OHPs) have attracted extensive attentions because of their high absorption coefficients,long charge carrier diffusion lengths.However,the preparation of OHPs with patterned architectures is still challenging.Herein,OHP nanonet and nanobowl arrays were fabricated by nanosphere lithography.Nanonets were obtained on flat silicon substrate,whereas nanobowl arrays were obtained on coarse FTO substrate.Owing to the 2D patterned structure and the enhanced crystalhnity,the OHP nanonet photodetector exhibited a high responsivity,which was 6 times higher than that of the compact OHP film.
Organometal halide perovskites(OHPs) have attracted extensive attentions because of their high absorption coefficients,long charge carrier diffusion lengths.However,the preparation of OHPs with patterned architectures is still challenging.Herein,OHP nanonet and nanobowl arrays were fabricated by nanosphere lithography.Nanonets were obtained on flat silicon substrate,whereas nanobowl arrays were obtained on coarse FTO substrate.Owing to the 2D patterned structure and the enhanced crystalhnity,the OHP nanonet photodetector exhibited a high responsivity,which was 6 times higher than that of the compact OHP film.
引文
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2 .Jeon,N.J.;Noh,J.H.;Yang,W.S.;Kim,Y.C.;Ryu,S.;Seo,J.;Seok,S.I.Nature 2015,517,476.
3 .Xiong,L.;Ibrahim,D.;Yi,C.;Jing,L.;Manuel,T.;Shaik,M.Z.;Mohammad,K.N.,Hong,H.;Michael G.Nat.Chem.2015,7,703.