Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 5, Issue 8, Pages 3812-3818Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ta09020f
Keywords
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Funding
- National Research Foundation of Korea (NRF) grant - Korean government (MSIP) [2015R1A2A1A10054230]
- Center for Advanced Soft Electronics under the Global Frontier Research Program [NRF-2012M3A6A5055225]
- Nano Material Technology Development Program [2012M3A7B4049989]
- National Research Foundation of Korea [2015R1A2A1A10054230, 2012M3A7B4049989] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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We introduce 1 step pin-hole free CH(3)NH(3)PbI(3-x)C(l)x perovskite layers by using heated airflow during the nucleation stage of the perovskite. Upon employing heated air, we stimulate uniformly distributed nuclei growth, resulting in a pin-hole free planar perovskite layer. We find an optimized heated airflow of 100 degrees C as the optimized condition. The resulting planar device employing a conventional TiO2 electron transporting layer exhibits 17.6% average power conversion efficiency with 14.3% maximum powerpoint (MPP) efficiency. In addition, our method gives a very reproducible perovskite layer. Thus, our pin-hole free perovskite layer allows for 14.9% efficiency in a larger area device (0.71 cm(2)) that is generally prone to shunting paths.
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