Open AccessResearch on Charge Accumulation and Transport in Hole-Conductor-Free Perovskite (CH3NH3PbI2Cl) -based Nanostructure Solar Cells
Author(s) -
Shuai Ma,
Lei Cao,
Yang Li,
Qiong Sun,
Hongzhou Dong,
Lifeng Dong
Publication year - 2014
Publication title -
ecs transactions
Language(s) - English
Resource type - Journals
eISSN - 1938-6737
pISSN - 1938-5862
DOI - 10.1149/06104.0361ecst
Subject(s) - ambipolar diffusion , perovskite (structure) , solar cell , materials science , nanostructure , perovskite solar cell , charge carrier , semiconductor , photovoltaic system , fabrication , optoelectronics , nanotechnology , energy conversion efficiency , charge (physics) , nanoparticle , absorption (acoustics) , chemistry , electron , physics , electrical engineering , crystallography , alternative medicine , medicine , pathology , quantum mechanics , composite material , engineering
In this paper, we propose a new kind of nanostructure solar cell involving perovskite CH 3 NH 3 PbI 2 Cl and metal-oxide semiconductor TiO 2 . Taking advantage of the promising properties of this solution-processed perovskite material such as good light absorption and ambipolar transport of charge carriers, we choose CH 3 NH 3 PbI 2 Cl as both a light absorber for TiO 2 nanoparticle sensitization and hole transport material, which helps to constitute a solid-state sensitized solar cell with much simpler construction. Specifically, the cell fabrication and characterization are reported; the analysis based on small-signal electrochemical measurements is in particular provided, in order to investigate internal mechanisms of this photovoltaic device, mainly including charge accumulation, recombination and transport through it.
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