Premium
Efficient Flexible Solar Cell based on Composition‐Tailored Hybrid Perovskite
Author(s) -
Bi Cheng,
Chen Bo,
Wei Haotong,
DeLuca Stephan,
Huang Jinsong
Publication year - 2017
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201605900
Subject(s) - materials science , perovskite (structure) , indium tin oxide , solar cell , perovskite solar cell , photoactive layer , indium , substrate (aquarium) , chemical engineering , oxide , roll to roll processing , optoelectronics , halide , thin film , layer (electronics) , nanotechnology , polymer solar cell , inorganic chemistry , metallurgy , oceanography , chemistry , geology , engineering
Organic–inorganic hybrid perovskites (OIHPs) are new photoactive layer candidates for lightweight and flexible solar cells due to their low‐temperature process capability; however, the reported efficiency of flexible OIHP devices is far behind those achieved on rigid glass substrates. Here, it is revealed that the limiting factor is the different perovskite film deposition conditions required to form the same film morphology on flexible substrates. An optimized perovskite film composition needs a different precursor ratio, which is found to be essential for the formation of high‐quality perovskite films with longer radiative carrier recombination lifetime, smaller density of trap states, reduced precursor residue, and uniform and pin‐hole free films. A record efficiency of 18.1% is achieved for the flexible perovskite solar‐cell devices made on an indium tin oxide/poly(ethylene terephthalate) substrate via a low temperature (≤100 °C) solution process.