Fabrication of Planar Heterojunction Perovskite Solar Cells by Controlled Low-Pressure Vapor Annealing

A new method for achieving high efficiency planar CH3NH3I3–x Cl x perovskite photovoltaics, based on a low pressure, reduced temperature vapor annealing is demonstrated. Heterojunction devices based on this hybrid halide perovskite exhibit a top PCE of 16.8%, reduced J–V hysteresis, and highly repea...

Full description

Saved in:
Bibliographic Details
Published in:The journal of physical chemistry letters 2015-02, Vol.6 (3), p.493-499
Main Authors: Li, Yanbo, Cooper, Jason K, Buonsanti, Raffaella, Giannini, Cinzia, Liu, Yi, Toma, Francesca M, Sharp, Ian D
Format: Article
Language:English
Subjects:
Calcium Compounds - chemistry
Electric Power Supplies
Oxides - chemistry
Sunlight
Titanium - chemistry
Vapor Pressure
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A new method for achieving high efficiency planar CH3NH3I3–x Cl x perovskite photovoltaics, based on a low pressure, reduced temperature vapor annealing is demonstrated. Heterojunction devices based on this hybrid halide perovskite exhibit a top PCE of 16.8%, reduced J–V hysteresis, and highly repeatable performance without need for a mesoporous or nanocrystalline metal oxide layer. Our findings demonstrate that large hysteresis is not an inherent feature of planar heterojunctions, and that efficient charge extraction can be achieved with uniform halide perovskite materials with desired composition. X-ray diffraction, valence band spectroscopy, and transient absorption measurements of these thin films reveal that structural modifications induced by chlorine clearly dominate over chemical and electronic doping effects, without affecting the Fermi level or photocarrier lifetime in the material.
ISSN:1948-7185
1948-7185
DOI:10.1021/jz502720a