基于WOx/PEDOT:PSS复合空穴传输层的高效稳定平面异质结钙钛矿太阳电池

乔文远; 郭强; 李聪; 马爽; 王福芝; 戴松元; 谭占鳌

doi:10.13208/j.electrochem.160141

电化学 >

2016 , Vol. 22 >Issue 4: 382 - 389

DOI: https://doi.org/10.13208/j.electrochem.160141

光电化学及新型太阳能电池近期研究专辑（厦门大学林昌健教授&中国科学院化学研究所李永舫院士主编）

基于WO_x/PEDOT:PSS复合空穴传输层的高效稳定平面异质结钙钛矿太阳电池

乔文远 ,
郭强 ,
李聪 ,
马爽 ,
王福芝 ,
戴松元 ,
谭占鳌

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华北电力大学新型薄膜太阳电池北京市重点实验室, 北京 102206

收稿日期: 2016-01-26

修回日期: 2016-03-01

网络出版日期: 2016-03-11

基金资助

江苏省科技支撑项目（BE2014147-4）、北京市科技计划项目（Z141100003314003）资助

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WO_x/PEDOT:PSS double-layered Hole-transport Layers for Efficient and Stable Planar Heterojunction Perovskite Solar Cells

QIAO Wen-yuan ,
GUO Qiang ,
LI Cong ,
MA Shuang ,
WANG Fu-zhi ,
DAI Song-yuan ,
TAN Zhan-ao

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Beijing Key Laboratory of Novel Thin Film Solar Cells, School of Renewable Energy, North China ElectricPower University,Beijing 102206, China

Received date: 2016-01-26

Revised date: 2016-03-01

Online published: 2016-03-11

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摘要

在基于钙钛矿/富勒烯平面异质结的钙钛矿太阳电池中，PEDOT:PSS是最常使用的空穴传输材料. 但PEDOT:PSS呈酸性，会腐蚀金属氧化物透明电极，使器件的电极界面稳定性欠佳. 本文将高功函的氧化钨（WO_x）插入到PEDOT:PSS和FTO之间，形成WO_x/PEDOT:PSS复合空穴传输层，这样既可以避免PEDOT:PSS与FTO直接接触，提高器件的稳定性，又可以进一步降低电极界面的接触势垒，从而提升器件的性能. 作者研究了复合传输层对透光率、钙钛矿形貌、钙钛矿结晶、光伏性能及器件稳定性的影响. 基于 WO_x/PEDOT:PSS复合空穴传输层的电池效率可以达到12.96%，比单纯的PEDOT:PSS的电池效率(10.56%)提升了22.7%，同时器件的稳定性也得到大幅改善.

关键词： 平面异质结; 钙钛矿太阳电池; 空穴传输层; 氧化钨; 稳定性

本文引用格式

乔文远 , 郭强 , 李聪 , 马爽 , 王福芝 , 戴松元 , 谭占鳌 . 基于WO_x/PEDOT:PSS复合空穴传输层的高效稳定平面异质结钙钛矿太阳电池[J]. 电化学, 2016 , 22(4) : 382 -389 . DOI: 10.13208/j.electrochem.160141

Abstract

Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) is a commonly used hole-transport material in the perovskite solar cells (PerSCs) structure of perovskite/fullerene planer heterojunction, but it also has a negative effect on the stability of device because of its acidity which will corrode metal oxide transparent electrodes. In this work, a WO_x hole-transport layer with high work function was inserted into the PEDOT: PSS and FTO to enhance the stability and photovoltaic performance. The inserted WO_x layer not only can avoid direct contact between PEDOT:PSS and FTO, but also can further reduce the contact barrier between the electrode interface. We studied the effect of WO_x/PEDOT:PSS double-layered hole transport layers on the optical transmittance, the morphology and crystals of perovskite, the photovoltaic performance and the stability of the devices. The power conversion efficiency (PCE) of PerSCs can be improved from 10.56% (with PEDOT:PSS layer) to 12.96% with WO_x/PEDOT:PSS double-layered hole transport layers, and the stability of the device has also been greatly improved.

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