表面等离子激元与F-P共振耦合平衡钙钛矿太阳能电池有源层内载流子产生速率

相春平; 袁占生; 刘璟; 金玉

doi:10.3788/fgxb20183912.1749

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表面等离子激元与F-P共振耦合平衡钙钛矿太阳能电池有源层内载流子产生速率

器件制备及器件物理 | 更新时间：2020-08-12

- 表面等离子激元与F-P共振耦合平衡钙钛矿太阳能电池有源层内载流子产生速率
- Surface Plasmon Polaritons and F-P Resonance Coupled Modes Balance The Generation Rate of Charge Carriers of Perovskite Solar Cells
- 发光学报 2018年39卷第12期页码：1749-1756
- 作者机构：
  
  1. 集美大学信息工程学院,福建厦门,361021
  2. 华侨大学信息科学与工程学院, 福建省光传输与变换重点实验室,福建厦门,361021
- 作者简介：
- 基金信息：
  
  福建省中青年教师教育科研项目（JAT170324）();华侨大学中青年教师科研提升资助计划（ZQN-PY508）();国家自然科学基金青年基金（61404053）();
- DOI：10.3788/fgxb20183912.1749
  中图分类号： O473;O436.2
- 收稿日期：2018-05-21，
  
  修回日期：2018-08-24，
  
  网络出版日期：2018-08-30，
  
  纸质出版日期：2018-12-05
- 稿件说明：
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相春平, 袁占生, 刘璟等. 表面等离子激元与F-P共振耦合平衡钙钛矿太阳能电池有源层内载流子产生速率[J]. 发光学报, 2018,39(12): 1749-1756

XIANG Chun-ping, YUAN Zhan-sheng, LIU Jing etc. Surface Plasmon Polaritons and F-P Resonance Coupled Modes Balance The Generation Rate of Charge Carriers of Perovskite Solar Cells[J]. Chinese Journal of Luminescence, 2018,39(12): 1749-1756
相春平, 袁占生, 刘璟等. 表面等离子激元与F-P共振耦合平衡钙钛矿太阳能电池有源层内载流子产生速率[J]. 发光学报, 2018,39(12): 1749-1756 DOI： 10.3788/fgxb20183912.1749.

XIANG Chun-ping, YUAN Zhan-sheng, LIU Jing etc. Surface Plasmon Polaritons and F-P Resonance Coupled Modes Balance The Generation Rate of Charge Carriers of Perovskite Solar Cells[J]. Chinese Journal of Luminescence, 2018,39(12): 1749-1756 DOI： 10.3788/fgxb20183912.1749.

摘要

为提高有机-无机杂化钙钛矿太阳能电池（PSCs）光吸收效率、平衡有源层中载流子产生速率，将周期性纳米光栅结构引入到PSCs器件结构中。分析了光栅周期、光栅高度和有源层厚度对表面等离子激元（SPPs）与法布里-珀罗（F-P）共振耦合模式的影响。通过改变光栅周期，实现了SPPs与F-P共振耦合波长范围与钙钛矿材料的弱吸收光谱区域相重合，同时光栅高度的增加可以增大耦合模式的光谱宽度。SPPs与F-P共振耦合模式实现了金属电极与电子传输层（ETL）界面处的局域电场增强。结果表明:场增强效应扩展到有源区，有效提高了PSCs有源层远入射光侧在570~800 nm波长范围内的光吸收，进而提高了有源层远入射光区域的载流子产生速率。当光栅周期为250 nm、光栅高度为50 nm、源层厚度为300 nm时，PSCs在太阳光弱吸收光谱区域内的本征吸收提高了~12%，有源层远入射光侧载流子产生速率提高了~41%。

Abstract

Thin-film photovoltaics play an important role in the quest for clean renewable energy. Recently

methylammonium lead halide perovskites were identified as promising absorbers for solar cells. To improve the absorption of perovskite solar cells(PSCs) and modify the distribution of the generation rate of charge carriers

the one dimensional periodic sinusoidal nano-grating structure is introduced into PSCs. We characterize the coupled modes between surface plasmon polaritons(SPPs) and Fabry-Prot(F-P) resonance

and analyze how they are affected by the period and height of the grating and the thickness of the active layer. The coupled modes enhance the light field in the weak absorbance spectrum region. Meanwhile

the width of coupled spectrum shows strong grating height dependence and will get a broad spectrum enhancement when the grating height is larger than 50 nm. The enhanced localized electric field near the interface of Ag/ETL expands into the active layer with an exponential decay length of~100 nm

results an absorption enhancement near the ETL/active layer interface. We calculate the absorption of the active layer by using a finite-difference time-domain(FDTD) method and the absorbance (the optimized grating structure with the grating period

the grating height and the thickness of active layer is 250 nm

50 nm and 300 nm

respectively) is improved by 12% in wavelength range of 650-800 nm in transverse magnetic (TM) light incidence condition. We also demonstrate an increased generation rate of charge carriers near the ETL/active layer interface due to the enhanced field. The normalized generation rate increases by 41%(110%) in the position of 250 nm(200 nm) away from the HTL/active layer interface in PSCs. A balanced generation rate in the whole active layer will improve the diffusion of electrons and the collection of carriers

result in the increasement of the power conversion efficiency.

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Keywords

references

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