Supporting Information
A New Hybrid Hole Extraction Layer of Perovskite Solar Cells with a Planar p-i-n Geometry Ik Jae Park,1, ‡ Min Ah Park,2, ‡ Dong Hoe Kim,3 Gyeong Do Park,1 Byeong Jo Kim,4 Hae Jung Son,2* Min Jae Ko,5 Doh-Kwon Lee,2 Taiho Park,6 Hyunjung Shin,7 Nam-Gyu Park, 8 Hyun Suk Jung,4 and Jin Young Kim1* 1
Department of Materials Science and Engineering, Seoul National University, Seoul 151-742,
Korea; 2Photo-electronic Hybrids Research Center, Korea Institute of Science and Technology (KIST), Seoul 136-791, Korea; 3Chemical and Materials Science Center, National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, Colorado 80401, United States; 4
School of Advanced Materials Science & Engineering, Sungkyunkwan University, Suwon 440-
746, Korea; 5KU-KIST Graduate School of Converging Science and Technology, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul 136-701, Korea; 6Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-gu, Pohang, Kyoungbuk, Korea; 7
Department of Energy Science, Sungkyunkwan University, Suwon 440-746, Republic of Korea;
8
School of Chemical Engineering and Department of Energy Science, Sungkyunkwan
University, Suwon 440-746, Korea
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Figure S1. (a) SEM images of the NiOx film and NiOx/PEDOT:PSS layer with PEDOT:PSS concentration showing top view. (scale bar: 1 µm) (b) EDS spectrum of the NiOx/PEDOT:PSS (5 v/v %) layer. Red square indicates sulfur peaks from the spectra.
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Figure S2. Scan rate and directional dependence of J–V measurements (with 1 v/v % PEDOT).
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Figure S3. Steady-state device performance (or operational stability) of a typical device.
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Figure S4. Transmittance spectra of the PEDOT:PSS, NiOx, and NiOx/PEDOT:PSS (5 v/v %) layer on the glass/ITO substrates.
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