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Undoped ZnO electrodes for low-cost indoor organic photovoltaics

Title
Undoped ZnO electrodes for low-cost indoor organic photovoltaics
Author
박진성
Keywords
POLYMER SOLAR-CELLS; ATOMIC LAYER DEPOSITION; OPEN-CIRCUIT VOLTAGE; ELECTRICAL-PROPERTIES; WORK FUNCTION; FILMS; PERFORMANCE; FULLERENE
Issue Date
2018-10
Publisher
ROYAL SOC CHEMISTRY
Citation
JOURNAL OF MATERIALS CHEMISTRY A, v. 6, no. 46, page. 23464-23472
Abstract
The unique features of organic photovoltaics (OPVs) offer great potential for their use as indoor energy harvesters. Here, we demonstrate for the first time the use of a low-cost undoped ZnO film for the transparent conducting electrode (TCE) of OPVs. Atomic layer deposition was employed to produce potentially defect-free and crystalline ZnO films. Poly(3-hexylthiophene) (P3HT):indene-C-60 bisadduct (ICBA)-based OPVs with 200 nm-thick ZnO TCEs were shown to hardly operate under 1 sun conditions due to the high sheet resistance (R-SH) of the ZnO film (260 sq(-1)). Surprisingly, the indoor performance of the OPVs was found to be barely dependent on the R-SH of the TCEs; rather, other factors such as leakage components associated with the shunt resistance were found to have a greater influence on the performance. The OPVs exhibited excellent indoor performance with a power-conversion efficiency (PCE) of 9.5 +/- 0.3% under a light emitting diode lamp with a luminance of 500 lux. The measured PCE was slightly higher than or comparable to that of reference devices with a 200 nm-thick ITO TCE. Finally, the ZnO TCE is expected to result in more than 20% cost reduction of the OPVs when compared with the ITO TCE.
URI
https://pubs.rsc.org/en/content/articlelanding/2018/TA/C8TA08432G#!divAbstracthttp://repository.hanyang.ac.kr/handle/20.500.11754/120228
ISSN
2050-7488; 2050-7496
DOI
10.1039/c8ta08432g
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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