大连化物所二维钙钛矿太阳能电池研究取得进展

上传 / 管理员 ·2017-09-12 材料科学,材料物理与化学,中科院成果,华人研究

论文标题 / Stable high efficiency two-dimensional perovskite solar cells via cesium doping

作者 / Xu Zhang, Kui Zhao(赵奎,陕西师范大学), Shengzhong (Frank) Liu(刘生忠,中国科学院大连化学物理研究所) et al.

期刊 / Energy & Environmental Science

发表时间 / 2017-08-15

数字识别码 / 10.1039/C7EE01145H

关注此文
分享至:

【论文摘要】

Two-dimensional (2D) organic–inorganic perovskites have recently emerged as one of the most important thin-film solar cell materials owing to their excellent environmental stability. The remaining major pitfall is their relatively poor photovoltaic performance in contrast to 3D perovskites. In this work we demonstrate cesium cation (Cs+) doped 2D (BA)2(MA)3Pb4I13 perovskite solar cells giving a power conversion efficiency (PCE) as high as 13.7%, the highest among the reported 2D devices, with excellent humidity resistance. The enhanced efficiency from 12.3% (without Cs+) to 13.7% (with 5% Cs+) is attributed to perfectly controlled crystal orientation, an increased grain size of the 2D planes, superior surface quality, reduced trap-state density, enhanced charge-carrier mobility and charge-transfer kinetics. Surprisingly, it is found that the Cs+ doping yields superior stability for the 2D perovskite solar cells when subjected to a high humidity environment without encapsulation. The device doped using 5% Cs+ degrades only ca. 10% after 1400 hours of exposure in 30% relative humidity (RH), and exhibits significantly improved stability under heating and high moisture environments. Our results provide an important step toward air-stable and fully printable low dimensional perovskites as a next-generation renewable energy source. 


近日,中国科学院大连化学物理研究所洁净能源国家实验室太阳能研究部硅基太阳能电池研究组研究院刘生忠带领的团队与陕西师范大学副教授赵奎合作,在二维(2D)钙钛矿电池领域取得新进展,相关研究成果发表在Energy & Environmental Science上。  

与3D钙钛矿电池相比,2D有机无机杂化钙钛矿材料拥有可调的光电性能和优异的环境稳定性两大优点。由于2D钙钛矿存在吸收系数低、电荷传输能力差和激子结合能大等问题,导致其光伏性能差,电池效率低下。DNL1606组在二维(BA)2(MA)3Pb4I13钙钛矿中掺杂Cs元素,使得电池效率提高13.7%,是目前报道的二维器件中最高效率。研究团队发现,Cs元素的加入有利于控制晶体取向,增加2D平面的晶粒尺寸,增强载流子迁移率和电荷传输动力学。同时,2D钙钛矿电池的稳定性得到了显著地提升,在30%湿度情况下,经过1400小时后,器件的效率仍然保持89%。这将有助于推动钙钛矿太阳能电池的商业化应用。

研究工作得到了国家重点研发计划,国家自然科学基金,中央高校基金、教育部“111引智计划”和“千人计划”项目的资助。

大连化物所二维钙钛矿太阳电池研究取得进展


文章来源:中科院官网

【文章链接】http://www.cas.cn/syky/201709/t20170911_4613939.shtml

参与评论

提交评论
正在加载 正在加载

身份认证

  • 真实姓名
  • 所在单位
  • 单位邮箱
  • 成果发表
  • ORCID

取消 提交

正在加载