多孔PbI2骨架用于高性能平面结钙钛矿太阳能电池
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- 英文论文题名：Mesoporous PbI2 Scaffold for High-Performance Planar Heterojunction Perovskite Solar Cells
- 论文作者：刘堂昊 ; 胡芹 ; 吴疆 ; 陈科 ; 朱瑞 ; 龚旗煌
- 英文论文作者：Tanghao Liu ; Qin Hu ; Jiang Wu ; Ke Chen ; Rui Zhu ; Qihuang Gong ; School of Physics ; Peking University
- 年：2016
- 作者机构：北京大学物理学院;
- 论文关键词：形貌调控 ; 多孔支架 ; 平面异质结 ; 顺序沉积法
- 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-第二十二分会：有机光伏的机遇和挑战
- 语种：中文
- 分类号：TM914.4
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第二十二分会 ; 有机光伏的机遇和挑战
- 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：302k
- 原文格式：D
- 会议级别：全国
摘要
由于钙钛矿材料具有对光的吸收强、电荷迁移率高、带隙可调控、易加工等优异的性能,钙钛矿太阳能电池在过去五年中发展迅速。在传统两步顺序沉积法制备钙钛矿薄膜的过程中,PbI_2先被沉积在介孔二氧化钛支架上,而后再浸入到甲胺碘溶液中,生成钙钛矿薄膜。~([1])然而,如果采用平面结器件结构,PbI_2转化成钙钛矿的过程可能会不充分,这主要因为PbI_2薄膜相对致密,使得甲胺碘难以与PbI_2薄膜充分接触和反应。针对这一问题,我们提出一种时间依赖的方法来调控碘化铅薄膜的形貌,实现了一种多孔的PbI_2薄膜。~([2])通过控制多孔PbI_2薄膜的形貌,从而可以实现PbI_2到钙钛矿的充分转化。基于这种方法,我们制备的正式器件在反扫条件下效率可达17.6%,反式器件的效率也可达15.7%,而且没有正反扫差异。
Owing to the excellent optoelectronic properties of perovskites, such as strong light absorption, high charge carrier mobility, tunable bandgap, etc., perovskite solar cells(Pero-SCs) have been developing rapidly in the past years. In the traditional sequential deposition process, PbI_2 is firstly deposited onto the mesoporous TiO_2 scaffold. Then the PbI_2 film is dipped into the CH_3NH_3 I solution to react with CH_3NH_3I and form perovskite film. However, on the planar substrate, the conversion from PbI_2 to perovskite may be incomplete for lack of channel in dense PbI_2 films. CH_3NH_3I can hardly contact and react with the PbI_2 under the surface. Here, we developed a time-dependent method to control the morphology of PbI_2 films, resulting in the mesoporous PbI_2 scaffold. Based on this PbI_2 film, the Pero-SC with regular planar structure delivered an efficiency of 17.6%, and the Pero-SC with inverted planar structure achieved an efficiency of 15.7% with ignorable hysteresis.
Owing to the excellent optoelectronic properties of perovskites, such as strong light absorption, high charge carrier mobility, tunable bandgap, etc., perovskite solar cells(Pero-SCs) have been developing rapidly in the past years. In the traditional sequential deposition process, PbI_2 is firstly deposited onto the mesoporous TiO_2 scaffold. Then the PbI_2 film is dipped into the CH_3NH_3 I solution to react with CH_3NH_3I and form perovskite film. However, on the planar substrate, the conversion from PbI_2 to perovskite may be incomplete for lack of channel in dense PbI_2 films. CH_3NH_3I can hardly contact and react with the PbI_2 under the surface. Here, we developed a time-dependent method to control the morphology of PbI_2 films, resulting in the mesoporous PbI_2 scaffold. Based on this PbI_2 film, the Pero-SC with regular planar structure delivered an efficiency of 17.6%, and the Pero-SC with inverted planar structure achieved an efficiency of 15.7% with ignorable hysteresis.
引文
[1]Burschka,J.;Pellet,N.;Moon,S.-J.;Humphry-Baker,R.;Gao,P.;Nazeeruddin,M.K.;Gratzel,M.Nature2013,499:316.
[2]Liu,T.;Hu,Q.;Wu,J.;Chen,K.;Zhao,L.;Liu,F.;Wang,C.;Lu,H.;Jia,S.;Russell,T.;Zhu,R.;Gong,Q.Adv.Energy Mater.2016,6:1501890.
[2]Liu,T.;Hu,Q.;Wu,J.;Chen,K.;Zhao,L.;Liu,F.;Wang,C.;Lu,H.;Jia,S.;Russell,T.;Zhu,R.;Gong,Q.Adv.Energy Mater.2016,6:1501890.