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Dichroic Sb 2 O 3 /Ag/Sb 2 O 3 Electrodes for Colorful Semitransparent Organic Solar Cells
Author(s) -
Song Seyeong,
Cho Hye Won,
Jeong Jaeki,
Yoon Yung Jin,
Park Song Yi,
Song Suhee,
Woo Byung Hoon,
Jun Young Chul,
Walker Bright,
Kim Jin Young
Publication year - 2020
Publication title -
solar rrl
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.544
H-Index - 37
ISSN - 2367-198X
DOI - 10.1002/solr.202000201
Subject(s) - materials science , electrode , optoelectronics , organic solar cell , transmittance , dichroic glass , layer (electronics) , active layer , short circuit , dielectric , visible spectrum , solar cell , optics , nanotechnology , chemistry , composite material , polymer , thin film transistor , physics , quantum mechanics , voltage
The pace of advancement and increasing power conversion efficiencies (PCEs) have provided the possibility for organic solar cells (OSCs) to be commercialized in a variety of applications, including semitransparent photovoltaics. The application of dielectric–metal–dielectric (DMD) transparent electrodes to OSCs is an effective way to achieve semitransparent OSCs with different colors. Herein, a DMD multilayer structure based on two Sb 2 O 3 layers and silver (Ag) thin films as the top electrode is introduced. An ultrathin Sb 2 O 3 layer is deposited between the electron transport layer and the Ag film as a bottom layer for the Sb 2 O 3 /Ag/Sb 2 O 3 electrode; this layer inhibits Ag atom diffusion and aggregation, which leads to uniform formation of ultrathin Ag films. The thickness of the middle metal layer influences fill factor and short‐circuit current density values, which correlate well with device resistance and light reflection. For the top Sb 2 O 3 layer, the thickness allows the selective transmittance of specific wavelengths of visible light while reflecting wavelengths that are not transmitted, creating a dichroic effect. OSCs are successfully fabricated using three kinds of colorful active layers in conjunction with Sb 2 O 3 /Ag/Sb 2 O 3 electrodes, resulting in vividly colored devices with PCE of 6.33–7.88% and average visible transmittances of 23–30%.