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Energy recycling under ambient illumination for internet-of-things using metal/oxide/metal-based colorful organic photovoltaics

Title
Energy recycling under ambient illumination for internet-of-things using metal/oxide/metal-based colorful organic photovoltaics
Authors
You Y.-J.Saeed M.A.Shafian S.Kim J.Hyeon Kim S.Kim S.H.Kim K.Shim J.W.
Ewha Authors
김경곤
SCOPUS Author ID
김경곤scopus
Issue Date
2021
Journal Title
Nanotechnology
ISSN
0957-4484JCR Link
Citation
Nanotechnology vol. 32, no. 46
Keywords
ambient light conditionscolorful organic photovoltaicsinterfacial optimizationmetal/oxide/metal electrodesolution-processed TiO2
Publisher
IOP Publishing Ltd
Indexed
SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
Colorful indoor organic photovoltaics (OPVs) have attracted considerable attention in recent years for their autonomous function in internet-of-things (IoT) devices. In this study, a solution-processed TiO2 layer in a metal-oxide-metal (MOM) color filter electrode is used for light energy recycling in P3HT:ICBA-based indoor OPVs. The MOM electrode allows for tuning of the optical cavity mode to maximize photocurrent production by modulating the thickness of the TiO2 layer in the sandwich structure. This approach preserves the OPVs' optoelectronic properties without damaging the photoactive layer and enables them to display a suitable range of vivid colors. The optimized MOM-OPVs demonstrated an excellent power conversion efficiency (PCE) of 8.8% 0.2%, which is approximately 20% higher than that of reference opaque OPVs under 1000 lx light emitting diode illumination. This can be attributed to the high photocurrent density due to the nonresonant light reflected from metals into the photoactive layer. Additionally, the proposed MOM-OPVs exhibited high external quantum efficiency and large parasitic shunt resistances, leading to improved fill factor and PCE values. Thus, the study's MOM electrode provides excellent feasibility for realizing colorful and efficient indoor OPVs for IoT applications. © 2021 IOP Publishing Ltd.
DOI
10.1088/1361-6528/ac13e7
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자연과학대학 > 화학·나노과학전공 > Journal papers
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