期刊
PROCESSES
卷 10, 期 8, 页码 -出版社
MDPI
DOI: 10.3390/pr10081477
关键词
perovskite; solar cell; single crystal; defect; surface passivation
资金
- Ministry of Science and Technology of Taiwan [MOST 109-2221-E-009-144-MY2, MOST 109-2221-E-009-147-MY3]
- Ministry of Education (MOE) of Taiwan (SPROUT Project-Center for Emergent Functional Matter Science of National Yang Ming Chiao Tung University)
- Ministry of Science and Technology of Taiwan
This article introduces a method of using TOPO treatment to passivate surface defects in single-crystal perovskite solar cells, thereby improving the photovoltaic performance and stability of the cells.
Perovskite solar cells (PeSCs) prepared with single crystals (SCs) ideally exhibit higher power conversion efficiencies (PCEs) because they possess a lower density of structural imperfection and superior charge transport. However, the density of the surface defects on the SCs is still very high, thereby inevitably affecting the device performance. Herein, perovskite single-crystal micro-plates were grown on a hole-transporting material, poly[bis(4-phenyl)(2,4,6-trimethylphenyl) amine], through a space-limited inverse temperature crystallization method. The surfaces of the as-prepared SCs were passivated using trioctylphosphine oxide (TOPO) during the device fabrication to alleviate the impact of surface defects. The PCE values are averagely improved from 11.90 +/- 0.30% to 14.76 +/- 0.65% after the surface passivation; the champion device even exhibits a PCE of 15.65%. The results from photoluminescence and hole-only devices reveal that TOPO treatments effectively reduce the number of surface defects on the single crystals, thereby improving the photovoltaic performance. The surface passivation also inhibits the hysteresis behavior due to the lower defect density. Finally, the TOPO treatment also improves the stability of the single-crystal PeSCs, presumably due to the hydrophobic long alkyl chains. Thus, this work provides an effective approach to achieving high efficiencies of single-crystal PeSCs.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据