Tuning The Crystal-growth and Coverage of Perovskite Thin-films for Highly Efficient Solar Cells by Using Polyacrylonitrile Additive

LI Jian-feng; LYU Jie; ZHAO Chuang; PENG Yi-chun; LI Cai-juan; XIA Yang-jun

doi:10.3788/fgxb20173807.0897

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Tuning The Crystal-growth and Coverage of Perovskite Thin-films for Highly Efficient Solar Cells by Using Polyacrylonitrile Additive

更新时间：2020-08-12

- Tuning The Crystal-growth and Coverage of Perovskite Thin-films for Highly Efficient Solar Cells by Using Polyacrylonitrile Additive
- Chinese Journal of Luminescence Vol. 38, Issue 7, Pages: 897-904(2017)
- 作者机构：
  
  1. 兰州交通大学光电技术与智能控制教育部重点实验室, 甘肃兰州 730070
  2. 兰州工业学院土木工程学院,甘肃兰州,730050
  3. 兰州工业学院电气工程学院,甘肃兰州,730050
- 作者简介：
- 基金信息：
  
  Supported by National Natural Science Foundation of China (51602139,61404067,5146301
- DOI：10.3788/fgxb20173807.0897
  CLC： O649.4
- Received：05 December 2016，
  
  Revised：24 January 2017，
  
  Published：05 July 2017
- 稿件说明：
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李建丰, 吕杰, 赵创等. 利用PNA添加剂来调控钙钛矿薄膜结晶和覆盖率实现高效太阳能电池[J]. 发光学报, 2017,38(7): 897-904

LI Jian-feng, LYU Jie, ZHAO Chuang etc. Tuning The Crystal-growth and Coverage of Perovskite Thin-films for Highly Efficient Solar Cells by Using Polyacrylonitrile Additive[J]. Chinese Journal of Luminescence, 2017,38(7): 897-904
李建丰, 吕杰, 赵创等. 利用PNA添加剂来调控钙钛矿薄膜结晶和覆盖率实现高效太阳能电池[J]. 发光学报, 2017,38(7): 897-904 DOI： 10.3788/fgxb20173807.0897.

LI Jian-feng, LYU Jie, ZHAO Chuang etc. Tuning The Crystal-growth and Coverage of Perovskite Thin-films for Highly Efficient Solar Cells by Using Polyacrylonitrile Additive[J]. Chinese Journal of Luminescence, 2017,38(7): 897-904 DOI： 10.3788/fgxb20173807.0897.

摘要

钙钛矿薄膜形貌的控制是一个提高太阳能电池能量转换效率的关键问题，而引入添加剂是解决这一问题的一种有效而简便的方法。利用聚丙烯腈（PNA）作为CH

PbI

前驱体溶液溶剂添加剂，通过其浓度可以调控钙钛矿薄膜结晶和表面的覆盖率。本文通过SEM、XRD以及UV-Vis研究了PNA掺杂CH

PbI

钙钛矿薄膜后的表面形貌、结晶度和光学性能的变化。结果表明，通过添加少量的PNA可以优化钙钛矿薄膜的性能，其强烈影响薄膜的结晶过程，有助于形成均匀连续的薄膜，减少针孔，从而增强了钙钛矿层的覆盖率和光吸收。当PNA 的含量为1%（质量分数）时，钙钛矿太阳能电池的各项性能最佳，能量转换效率达到了8.38%。与未加PNA 的电池效率（1.31%）相比，提高了540%。这些结果表明，PNA可以有效调控钙钛矿薄膜的晶体生长和薄膜形貌，在钙钛矿太阳能电池的大规模生产过程中是一种可以改善钙钛矿薄膜质量的有效添加剂。

Abstract

For perovskite solar cells

the morphology control of the perovskite thin-films is one of the key questions for improving the power conversion efficiency (PCE). To solve this issue

introduction of additive is proved to be an effective and simple way. Herein

polyacrylonitrile (PAN) was used as a solvent additive in the one-step CH

PbI

precursor solution

and the crystallization and surface coverage of the CH

PbI

films were controlled by means of adjusting its concentration

by means of adjusting its concentration to control the crystallization and surface coverage of the CH

PbI

films. Meanwhile

the film crystallinities

morphologies

and optical properties of CH

PbI

perovskite layers are characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD) and UV-Vis. These experiment results show that the perovskite film properties can be optimized just by combining a small number of PAN

and PAN can strongly influence the crystallization process of forming pure CH

PbI

and facilitate forming the homogenous continuous films with fewer pinholes

which leads to a strengthened crystallization of CH

PbI

and remarkably improved coverage and light absorption of CH

PbI

on a planar substrate. After adding 1% mass fraction of PAN

the optimized PCE of CH

PbI

solar cells was increased from 1.31% to 8.13% for the planar cell structure. These results prove that PNA is an effective additive which could improve the quality of perovskite thin-films and potentially be a new candidate as an easily accessible additive during perovskite solar cells mass production.

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Keywords

references

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Related Institution

Key Lab of Optoelectronic Technology and Intelligent Control of Education Ministry, Lanzhou Jiaotong University

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Institute for Photonics Technology， Fujian Key Laboratory for Advanced Micro-Nano Photonics Technology and Devices， Fujian Provincial Collaborative Innovation Center for Ultra-Precision Optical Engineering and Applications， Quanzhou Normal University

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