Skip to content
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Menu
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Menu
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
biochemistry, genetics and molecular biology
Organometal halide perovskite solar cell materials rationalized: Ultrafast charge generation, high and microsecond-long balanced mobilities, and slow recombination
Journal of the American Chemical Society, Volume 136, No. 14, Year 2014
Notification
URL copied to clipboard!
Description
Organometal halide perovskite-based solar cells have recently been reported to be highly efficient, giving an overall power conversion efficiency of up to 15%. However, much of the fundamental photophysical properties underlying this performance has remained unknown. Here, we apply photoluminescence, transient absorption, time-resolved terahertz and microwave conductivity measurements to determine the time scales of generation and recombination of charge carriers as well as their transport properties in solution-processed CH
3
NH
3
PbI
3
perovskite materials. We found that electron-hole pairs are generated almost instantaneously after photoexcitation and dissociate in 2 ps forming highly mobile charges (25 cm
2
V
-1
s
-1
) in the neat perovskite and in perovskite/alumina blends; almost balanced electron and hole mobilities remain very high up to the microsecond time scale. When the perovskite is introduced into a TiO
2
mesoporous structure, electron injection from perovskite to the metal oxide is efficient in less than a picosecond, but the lower intrinsic electron mobility of TiO
2
leads to unbalanced charge transport. Microwave conductivity measurements showed that the decay of mobile charges is very slow in CH
3
NH
3
PbI
3
, lasting up to tens of microseconds. These results unravel the remarkable intrinsic properties of CH
3
NH
3
PbI
3
perovskite material if used as light absorber and charge transport layer. Moreover, finding a metal oxide with higher electron mobility may further increase the performance of this class of solar cells. © 2014 American Chemical Society.
Authors & Co-Authors
Ponseca, Carlito S.
Sweden, Lund
Lunds Universitet
Savenije, Tom J.
Netherlands, Delft
Delft University of Technology
Abdellah, Mohamed A.
Sweden, Lund
Lunds Universitet
Egypt, Qena
Faculty of Science
Zheng, Kaibo
Sweden, Lund
Lunds Universitet
Yartsev, Arkady P.
Sweden, Lund
Lunds Universitet
Pascher, Torbjörn
Sweden, Lund
Lunds Universitet
Harlang, Tobias
Sweden, Lund
Lunds Universitet
Chábera, Pavel
Sweden, Lund
Lunds Universitet
Pullèrits, Tönu T.
Sweden, Lund
Lunds Universitet
Stepanov, Andrey
Switzerland, Geneva
Université de Genève
Wolf, J. P.
Switzerland, Geneva
Université de Genève
Sundström, Villy
Sweden, Lund
Lunds Universitet
Statistics
Citations: 1,038
Authors: 12
Affiliations: 4
Identifiers
Doi:
10.1021/ja412583t
ISSN:
00027863
e-ISSN:
15205126