Effect of Passivation Layer on Trap Assisted Recombination in Inverted Perovskite Solar Cells

被引：0

作者：

Wang S. ^{[1
]}

Hou Y.-Z. ^{[1
]}

Zhang F. ^{[1
]}

Ye S. ^{[1
]}

Song J. ^{[1
]}

机构：

[1] Key Laboratory of Optoelectronic Devices and Systems, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen

来源：

Faguang Xuebao/Chinese Journal of Luminescence | 2021年 / 42卷 / 07期

基金：

中国国家自然科学基金;

关键词：

Fluorescence-lifetime imaging microscopy; Inverted perovskite solar cell; O-F-PEAI; PEAI; Surface passivation;

D O I：

10.37188/CJL.20210103

中图分类号：

学科分类号：

摘要：

Organic-inorganic lead halide perovskite polycrystalline thin film solar cells have achieved rapid growth in photoelectric conversion efficiency in recent years of research. However, the active layer of its polycrystalline structure causes the device to still suffer performance degradation caused by defects in the surface and grain boundary positions. In this study, two organic salts, namely, phenethylammonium iodide(PEAI) and 2-fluorophenylethylammonium iodide(o-F-PEAI), were used to form a passivation layer on the surface of perovskite film. Scanning electron microscopy(SEM) and atomic force microscopy(AFM) analysis results show that the grain boundaries of the perovskite film treated with PEAI and o-F-PEAI are obviously filled with passivation layer, and the surface roughness is also significantly reduced. In addition, the fluorescence lifetime imaging(FLIM) analysis results show that the passivated perovskite film has more photons and longer fluorescence lifetime. The above results indicate that the passivation layer induced by PEAI and o-F-PEAI can effectively inhibit the composite behavior of defects on the surface and grain boundary of the polycrystalline film. Therefore, the power conversion efficiency(PCE) of the inverted structure perovskite solar cell device after passivation can reach 21%. In addition, the devices after o-F-PEAI passivation show better device stability due to the effect of fluoride ions. © 2021, Science Press. All right reserved.

引用

页码：1029 / 1039

页数：10

共 26 条

[1] KOJIMA A, TESHIMA K, SHIRAI Y, Et al., Organometal halide perovskites as visible-light sensitizers for photovoltaic cells, J. Am. Chem. Soc, 131, 17, pp. 6050-6051, (2009)
[2] STRANKS S D, EPERON G E, GRANCINI G, Et al., Electron-hole diffusion lengths exceeding 1 micrometer in an organometal trihalide perovskite absorber, Science, 342, 6156, pp. 341-344, (2013)
[3] SALIBA M, MATSUI T, DOMANSKI K, Et al., Incorporation of rubidium cations into perovskite solar cells improves photovoltaic performance, Science, 354, 6309, pp. 206-209, (2016)
[4] GRATZEL M., The light and shade of perovskite solar cells, Nat. Mater, 13, 9, pp. 838-842, (2014)
[5] Best research-cell efficiency chart
[6] JIANG Q, ZHAO Y, ZHANG X W, Et al., Surface passivation of perovskite film for efficient solar cells, Nat. Photonics, 13, 7, pp. 460-466, (2019)
[7] SHAO Y C, YUAN Y B, HUANG J S., Correlation of energy disorder and open-circuit voltage in hybrid perovskite solar cells, Nat. Energy, 1, 1, (2016)
[8] TRESS W, MARINOVA N, INGANAS O, Et al., Predicting the open-circuit voltage of CH3NH3PbI3 perovskite solar cells using electroluminescence and photovoltaic quantum efficiency spectra: the role of radiative and non-radiative recombination, Adv. Energy Mater, 5, 3, (2015)
[9] YAO J Z, KIRCHARTZ T, VEZIE M, Et al., Quantifying losses in open-circuit voltage in solution-processable solar cells, Phys. Rev. Appl, 4, 1, (2015)
[10] LI X A, LIU W, CHU L., Recent advances on defect passivation of perovskite solar cells, J. Nanjing Univ. Posts Telecommun. (Nat. Sci. Ed.), 41, 1, pp. 9-16, (2021)

← 1 2 3 →