Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 10, Issue 3, Pages 2224-2229Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b16662
Keywords
perovskite solar cells; brookite TiO2; low-temperature process; amorphous; metal oxide electron collector
Funding
- Japan Science and Technology Agency (JST) Advanced Low Carbon Technology R&D program (ALCA)
- Izumi Science and Technology Foundation
- Japanese Society for Promotion of Science (JSPS) [26289265]
- New Energy and Industrial Technology Development Organization (NEDO)
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A fully low-temperature-processed perovskite solar cell was fabricated with an ultrathin amorphous TiOx hole-blocking layer in combination with brookite TiO2 prepared at temperature <150 degrees C. Structured with TiOx/brookite TiO2 bilayer electron collector, the perovskite solar cells exhibit high efficiency up to 21.6% being supported by high open-circuit voltage and fill factor up to 1.18 V and 0.83, respectively. Compared to SnOx hole-blocking layer, TiOx has better electron band alignment with brookite TiO2 and hence, results in higher efficiency.
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