Enhancement of The Photovoltaic Performance of CH3NH3PbI3 Perovskite Solar Cells by Using Polyvinylpyrrolidone Additive

LI Jian-feng; ZHAO Chuang; ZHANG Heng; TONG Jun-feng; ZHANG Peng; YANG Chun-yan; XIA Yang-

doi:10.3788/fgxb20163701.0056

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Enhancement of The Photovoltaic Performance of CH₃NH₃PbI₃ Perovskite Solar Cells by Using Polyvinylpyrrolidone Additive

更新时间：2020-08-12

- Enhancement of The Photovoltaic Performance of CH₃NH₃PbI₃ Perovskite Solar Cells by Using Polyvinylpyrrolidone Additive
- Chinese Journal of Luminescence Vol. 37, Issue 1, Pages: 56-62(2016)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20163701.0056
  CLC： O649.4;TM914.4
- Received：18 September 2015，
  
  Revised：10 November 2015，
  
  Published：10 January 2016
- 稿件说明：
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李建丰, 赵创, 张恒等. 利用PVP添加剂提高钙钛矿太阳能电池光伏性能[J]. 发光学报, 2016,37(1): 56-62

LI Jian-feng, ZHAO Chuang, ZHANG Heng etc. Enhancement of The Photovoltaic Performance of CH3NH3PbI3 Perovskite Solar Cells by Using Polyvinylpyrrolidone Additive[J]. Chinese Journal of Luminescence, 2016,37(1): 56-62
李建丰, 赵创, 张恒等. 利用PVP添加剂提高钙钛矿太阳能电池光伏性能[J]. 发光学报, 2016,37(1): 56-62 DOI： 10.3788/fgxb20163701.0056.

LI Jian-feng, ZHAO Chuang, ZHANG Heng etc. Enhancement of The Photovoltaic Performance of CH3NH3PbI3 Perovskite Solar Cells by Using Polyvinylpyrrolidone Additive[J]. Chinese Journal of Luminescence, 2016,37(1): 56-62 DOI： 10.3788/fgxb20163701.0056.

摘要

研究了聚乙烯吡络烷酮( PVP) 作为添加剂对CH

PbI

钙钛矿基太阳能电池光电性能的影响。通过SEM、XRD和UV-Vis等手段

研究了不同浓度PVP掺杂CH

PbI

钙钛矿前驱体对薄膜的表面形貌、结晶度和光学性能的影响。结果表明

少量的PVP添加可以调控钙钛矿薄膜的质量

添加了PVP的钙钛矿薄膜的吸收性能明显得到提高

且吸收峰红移了20 nm;同时

不仅增加了CH

PbI

的结晶度

而且还明显提高了钙钛矿薄膜的覆盖率

减少了钙钛矿薄膜中的针孔结构。在CH

PbI

前驱体溶液中添加质量分数为1%的PVP

得到的钙钛矿太阳能电池的能量转换效率达到8.38%。与未加PVP 的标准电池器件效率(1.30%)相比

效率提高了544%。这些结果表明

通过添加剂来调控一步法CH

PbI

的晶体生长和薄膜形貌来获取高性能的钙钛矿太阳能电池是很有前途的。

Abstract

We demonstrate a new one-step solution approach to prepare perovskite CH

PbI

films by adding polyvinylpyrrolidone (PVP) to the standard CH

PbI

precursor solution. The film morphologies

crystallinities

and optical properties of CH

PbI

perovskite layers are carefully studied by SEM

XRD

and UV-Vis. The results reveal that the perovskite film properties can be manipulated by incorporating a small amount of PVP. The absorbance of the film with PVP additive is significantly higher than the pristine film and the absorption peak is red shift by 20 nm

indicating the perovskite film with additive possessing better crystal structures. The use of PVP strongly affects the crystallization process of forming pure CH

PbI

and helps the formation of smooth film

leading not only to enhanced crystallization of CH

PbI

but also to significantly improved coverage of CH

PbI

on a planar substrate. The optimized power conversion efficiency (PCE) of CH

PbI

solar cells improved from 1.30% to 8.38% for the planar cell structure after the addition of 1% mass fraction of PVP. These results suggest that this new one-step solution approach is promising for controlling CH

PbI

growth to achieve high-performance perovskite solar cells.

关键词

Keywords

references

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