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Annealing‐Free Cr2O3 Electron‐Selective Layer for Efficient Hybrid Perovskite Solar Cells
ChemSusChem ( IF 8.4 ) Pub Date : 2018-01-09 , DOI: 10.1002/cssc.201701864
Jia Dong 1 , Jihuai Wu 1 , Jinbiao Jia 1 , Xin He 1 , Zhang Lan 1 , Leqing Fan 1 , Jianming Lin 1 , Miaoliang Huang 1
Affiliation  

The electron‐selective layer (ESL) plays a pivotal role in the performance of perovskite solar cells (PSCs). In this study, amorphous dispersible chromium oxide (Cr2O3) nanosheets are synthesized by a facile solvothermal reaction, and a Cr2O3 ESL is prepared by spin‐coating Cr2O3 ink on fluorine‐doped tin oxide substrates without need for further annealing. By using Cr2O3 as the electron‐selective layer and Cs0.05(MA0.17FA0.83)0.95Pb(I0.83Br0.17)3 as the light‐absorption layer, a planar hybrid perovskite solar cell is fabricated. The spin‐coating speed is optimized, the structure and morphology of samples are observed, the photoelectrical properties of ESLs are characterized, and the photovoltaic behaviors of devices are measured. Results show that the as‐prepared Cr2O3 layer has high optical transmittance and superb electron extraction and carrier transport property. The planar hybrid PSC based on the optimized Cr2O3 ESL achieves a power conversion efficiency of 16.23 %, which is comparable to devices based on a conventional high‐temperature‐calcined TiO2 ESL. These results demonstrate a low‐cost and facile route to highly effective perovskite solar cells.

中文翻译:

高效混合钙钛矿太阳能电池的无退火Cr2O3电子选择层

电子选择层(ESL)在钙钛矿太阳能电池(PSC)的性能中起着关键作用。在这项研究中,通过容易的溶剂热反应合成了无定形的可分散的氧化铬(Cr 2 O 3)纳米片,并通过将Cr 2 O 3油墨旋涂在掺氟的氧化锡衬底上制备了Cr 2 O 3 ESL。以便进一步退火。通过使用Cr 2 O 3作为电子选择层和Cs 0.05(MA 0.17 FA 0.830.95 Pb(I 0.83 Br 0.173作为光吸收层,制造了平面混合钙钛矿太阳能电池。优化了旋涂速度,观察了样品的结构和形态,表征了ESL的光电性能,并测量了器件的光伏性能。结果表明,所制备的Cr 2 O 3层具有较高的透光率,并具有极好的电子提取和载流子传输性能。基于优化的Cr 2 O 3 ESL的平面混合PSC实现了16.23%的功率转换效率,这与基于常规高温煅烧TiO 2的器件相当ESL。这些结果表明,以低成本,便捷的方式生产高效钙钛矿型太阳能电池是可行的。
更新日期:2018-01-09
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