Journal
NANOSCALE
Volume 8, Issue 6, Pages 3816-3822Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5nr08935b
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Funding
- National University Research Fund [GK261001009]
- Changjiang Scholar and Innovative Research Team [IRT_14R33]
- Overseas Talent Recruitment Project [B14041]
- Chinese National 1000-talent-plan program [1110010341]
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Regulating the temperature during the direction contact and intercalation process ( DCIP) for the transition from PbI2 to CH3NH3PbI3 modulated the crystallinity, crystal grain size and crystal grain orientation of the perovskite films. Higher temperatures produced perovskite films with better crystallinity, larger grain size, and better photovoltaic performance. The best cell, which had a PCE of 12.9%, was obtained on a film prepared at 200 degrees C. Further open circuit voltage decay and film resistance characterization revealed that the larger grain size contributed to longer carrier lifetime and smaller carrier transport resistance, both of which are beneficial for solar cell devices.
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