Open AccessEfficient light harvesting in perovskite layer via three-dimensional TiO2 nanobranched nanorod scaffold
Author(s) -
Shervin Daneshvar e Asl,
Hamaneh Zarenezhad,
Masoud Askari,
Mohammad Halali,
S.K. Sadrnezhaad
Publication year - 2020
Publication title -
nano express
Language(s) - English
Resource type - Journals
ISSN - 2632-959X
DOI - 10.1088/2632-959x/abc599
Subject(s) - nanorod , materials science , perovskite (structure) , mesoporous material , thin film , nanotechnology , perovskite solar cell , photoluminescence , layer (electronics) , optoelectronics , nanoparticle , photovoltaic system , solar cell , chemical engineering , chemistry , ecology , biochemistry , engineering , biology , catalysis
A comparative study was done on three types of TiO 2 thin film morphology, i.e., mesoporous nanoparticles, nanorods, and nanobranched nanorods thin films, as the scaffold for the perovskite solar cell. The performances of the perovskite-coated thin films were compared in terms of charge carrier extraction, charge transport, and solar energy harvesting via photoluminescence and UV–vis spectroscopies. TiO 2 nanobranched nanorods thin film showed better photovoltaic performance than those of mesoporous nanoparticles and nanorods thin films. The better optical properties of nanobranched nanorods thin film as the scaffold is ascribed to its unique morphological advantages, i.e., remarkable specific surface area along with high-speed pathways for charge carriers. These characteristics lead to great, compact, and uniform perovskite loading, excellent electron transport property, and desired light harvesting performance, which are preferable features for promoting the efficiency of the perovskite solar cells. This paper introduces an outstanding scaffold for fabrication of high-performance perovskite solar cells.