Journal
JAPANESE JOURNAL OF APPLIED PHYSICS
Volume 57, Issue 4, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.7567/JJAP.57.04FS07
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- New Energy and Industrial Technology Development Organization (NEDO)
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We fabricated perovskite solar cells (PSCs) with an inverted p-i-n planar structure using a NiOx film as a hole-transporting layer. Since the surface of the NiOx film fabricated by sputtering is hydrophobic, O-2 plasma treatment under various conditions was performed to improve its wettability. Water contact angles after the treatment under both normal and weak conditions on the NiOx film reached approximately 15 degrees. After the treatment, the valence band level of the NiOx film was deeper by about 0.15 eV. The maximum efficiency of the NiOx-based device under the optimized O-2 plasma condition reached 12.3%. (c) 2018 The Japan Society of Applied Physics.
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