Thermal-Induced Volmer-Weber Growth Behavior for Planar Heterojunction Perovskites Solar Cells
File version
Author(s)
Yang, Shuang
Chen, Xiao
Chen, Ying
Hou, Yu
Yang, Hua Gui
Griffith University Author(s)
Primary Supervisor
Other Supervisors
Editor(s)
Date
Size
File type(s)
Location
License
Abstract
Recently, a hot casting technique was developed to prepare pinhole free perovskite thin films with millimeter-scale grains. However, its intrinsic formation mechanism has not been studied in the literature up to now. Here, we demonstrate a Volmer–Weber growth mechanism during the hot casting, a process that typically involves the formation of island shaped grains and the following integration into dense perovskite films. It was found that such crystal growth was determined by the multiple effect of thermal energy and force centrifugal field. Particularly, the thermal energy can facilitate the formation of CH3NH3PbI3 and overcome the energy barriers of the precursor solutions on the substrates. The detailed morphologies of CH3NH3PbI3 films can be optimized by regulating deposition parameters including casting temperature and rotate speed. Solar cells constructed with these thin films achieve an average power conversion efficiency of 12.6 ± 0.3% under standard AM 1.5 G conditions.
Journal Title
Chemistry of Materials
Conference Title
Book Title
Edition
Volume
27
Issue
14
Thesis Type
Degree Program
School
Publisher link
Patent number
Funder(s)
Grant identifier(s)
Rights Statement
Rights Statement
Item Access Status
Note
Access the data
Related item(s)
Subject
Chemical sciences
Engineering
Science & Technology
Physical Sciences
Chemistry, Physical
Materials Science, Multidisciplinary
Persistent link to this record
Citation
Zheng, YC; Yang, S; Chen, X; Chen, Y; Hou, Y; Yang, HG, Thermal-Induced Volmer-Weber Growth Behavior for Planar Heterojunction Perovskites Solar Cells, Chemistry of Materials, 2015, 27 (14), pp. 5116-5121