当前位置: X-MOL 学术ACS Energy Lett. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Bilateral Interface Engineering toward Efficient 2D–3D Bulk Heterojunction Tin Halide Lead-Free Perovskite Solar Cells
ACS Energy Letters ( IF 22.0 ) Pub Date : 2018-02-19 00:00:00 , DOI: 10.1021/acsenergylett.8b00085
Chenxin Ran 1 , Jun Xi 1, 2 , Weiyin Gao 1 , Fang Yuan 1 , Ting Lei 1 , Bo Jiao 1 , Xun Hou 1 , Zhaoxin Wu 1, 3
Affiliation  

As a promising substitute for toxic lead-based perovskite, tin (Sn)-based halide perovskite has drawn much attention for photovoltaic applications. However, unsatisfied open-circuit voltage (VOC) and fill factor (FF) values of the available Sn-based perovskite solar cells (PSCs) remain a lingering cloud. In this work, we report a bilateral interfacial engineering strategy to fabricate 2D–3D bulk heterojunction Sn-based perovskite solar cells. Specifically, large cation PEAI and bifunctional LiF are evaporated at the bilateral interfaces of a FASnI3 film. The presence of PEAI improves the VOC and FF of the PSCs via improved surface coverage and the formed 2D–3D bulk heterojunction structure, while the bifunctional LiF (i) lowers the work function of PEDOT:PSS and (ii) facilitates hole extraction at the ITO/PEDOT:PSS interface. This strategy enabled a power conversion efficiency (PCE) of 6.98% with a VOC of 0.47 V and FF of 0.74. Our findings will add critical building bricks toward efficient Sn-based PSCs.

中文翻译:

面向高效2D–3D块状异质结卤化锡无铅钙钛矿太阳能电池的双边接口工程

作为有毒的铅基钙钛矿的有前途的替代品,锡(Sn)基卤化物钙钛矿已引起光伏应用的广泛关注。但是,可用的锡基钙钛矿太阳能电池(PSC)的不满意的开路电压(V OC)和填充系数(FF)值仍然困扰不已。在这项工作中,我们报告了制造2D–3D块状异质结Sn基钙钛矿太阳能电池的双边界面工程策略。具体而言,大阳离子PEAI和双功能LiF在FASnI 3膜的双边界面处蒸发。PEAI的存在可改善V OC通过改善表面覆盖率和形成的2D–3D本体异质结结构实现PSC的FF和FF,而双功能LiF(i)降低了PEDOT:PSS的功函数,并且(ii)促进了ITO / PEDOT:PSS界面处的空穴提取。该策略使电源转换效率(PCE)为6.98%,而V OC为0.47 V,FF为0.74。我们的发现将为高效的锡基PSC添加关键的建筑砖。
更新日期:2018-02-19
down
wechat
bug