通过对电子束蒸发TiO2退火效应的系统研究提高钙钛矿太阳能电池的性能

Boosting the Performance of Perovskite Solar Cells through Systematic Investigation of the Annealing Effect of E-Beam Evaporated TiO.

作者信息

Xue Tao, Chen Dandan, Li Ting, Chou Xingxing, Wang Xiao, Tang Zhenyu, Zhang Fanghui, Huang Jin, Guo Kunping, Takaloo Ashkan Vakilipour

机构信息

School of Electronic Information and Artificial Intelligence, Shaanxi University of Science and Technology, Xi'an 710021, China.

School of Electrical and Control Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China.

出版信息

Micromachines (Basel). 2023 May 23;14(6):1095. doi: 10.3390/mi14061095.

DOI:10.3390/mi14061095

PMID:37374680

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10301945/

Abstract

Electron transport layer (ETL) plays an undeniable role in improving the performance of n-i-p planar perovskite solar cells (PSCs). Titanium dioxide (TiO) is known as a promising ETL material for perovskite solar cell. In this work, the effect of annealing temperature on optical, electrical, and surface morphology of the electron-beam (EB)-evaporated TiO ETL, and consequently on the performance of perovskite solar cell, was investigated. It was found that annealing treatment at an optimized temperature of 480 °C considerably improved the surface smoothness, density of grain boundaries, and carrier mobility of TiO film, which resulted in nearly 10-fold improvement in power conversion efficiency (11.16%) in comparison with the unannealed device (1.08%). The improvement in performance of the optimized PSC is attributed to the acceleration of charge carrier extraction, as well as suppression of the recombination at the ETL/Perovskite interface.

摘要

电子传输层（ETL）在提高n-i-p平面钙钛矿太阳能电池（PSC）的性能方面发挥着不可忽视的作用。二氧化钛（TiO）是一种已知的用于钙钛矿太阳能电池的有前景的ETL材料。在这项工作中，研究了退火温度对电子束（EB）蒸发的TiO ETL的光学、电学和表面形貌的影响，并进而研究了其对钙钛矿太阳能电池性能的影响。结果发现，在480°C的优化温度下进行退火处理，可显著提高TiO薄膜的表面光滑度、晶界密度和载流子迁移率，与未退火器件（1.08%）相比，功率转换效率提高了近10倍（11.16%）。优化后的PSC性能的提高归因于电荷载流子提取的加速以及ETL/钙钛矿界面处复合的抑制。