Abstract
Either side of organic photovoltaics incorporates a transparent conducting electrode for light entry, which becomes particularly crucial under indoor light conditions with low light intensity. However, since electrical resistivity and optical transparency with respect to film thickness are mutually contradictory, sufficiently thick (>150 nm) electrodes are inevitably required to ensure the appropriate electrical conductivity, at the sacrifice of transmittance. This paper introduces an electric field induced filament doping method to realize ultra-thin indium tin oxide with high conductivity. The proposed method allows for injecting metal dopants (i.e., Ni) into ultra-thin indium tin oxide under an electric field, enabling substantial resistance reduction while retaining high transmittance and low surface roughness. Optimum light absorption and effective carrier transport via filament doping provides improved performance for indoor organic photovoltaics. As a proof-of-principle demonstration, we fabricate poly(3-hexylthiophene):indene-C60 bisadduct based inverted organic photovoltaics with 10 nm Ni-doped indium tin oxide as a transparent cathode, leading to a power conversion efficiency of 14.6 ± 1.8% under the 1000-lux light-emitting diode. This efficiency is 40% higher than that achieved from the device using commercially available 150 nm indium tin oxide.
| Original language | English |
|---|---|
| Pages (from-to) | 165-175 |
| Number of pages | 11 |
| Journal | Journal of Power Sources |
| Volume | 424 |
| DOIs | |
| Publication status | Published - 2019 Jun 1 |
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Keywords
- Filament doping
- Indoor organic photovoltaics
- Sheet resistance
- Transmittance
- Ultra-thin indium tin oxide
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering
Cite this
Tailoring Opto-electrical properties of ultra-thin indium tin oxide films via filament doping : Application as a transparent cathode for indoor organic photovoltaics. / Kim, Yong Woon; Goo, Ji Soo; Lee, Tae Ho; Lee, Byeong Ryong; Shin, Sang Chul; Kim, Hyeok; Shim, Jae Won; Kim, Tae Geun.
In: Journal of Power Sources, Vol. 424, 01.06.2019, p. 165-175.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Tailoring Opto-electrical properties of ultra-thin indium tin oxide films via filament doping
T2 - Application as a transparent cathode for indoor organic photovoltaics
AU - Kim, Yong Woon
AU - Goo, Ji Soo
AU - Lee, Tae Ho
AU - Lee, Byeong Ryong
AU - Shin, Sang Chul
AU - Kim, Hyeok
AU - Shim, Jae Won
AU - Kim, Tae Geun
PY - 2019/6/1
Y1 - 2019/6/1
N2 - Either side of organic photovoltaics incorporates a transparent conducting electrode for light entry, which becomes particularly crucial under indoor light conditions with low light intensity. However, since electrical resistivity and optical transparency with respect to film thickness are mutually contradictory, sufficiently thick (>150 nm) electrodes are inevitably required to ensure the appropriate electrical conductivity, at the sacrifice of transmittance. This paper introduces an electric field induced filament doping method to realize ultra-thin indium tin oxide with high conductivity. The proposed method allows for injecting metal dopants (i.e., Ni) into ultra-thin indium tin oxide under an electric field, enabling substantial resistance reduction while retaining high transmittance and low surface roughness. Optimum light absorption and effective carrier transport via filament doping provides improved performance for indoor organic photovoltaics. As a proof-of-principle demonstration, we fabricate poly(3-hexylthiophene):indene-C60 bisadduct based inverted organic photovoltaics with 10 nm Ni-doped indium tin oxide as a transparent cathode, leading to a power conversion efficiency of 14.6 ± 1.8% under the 1000-lux light-emitting diode. This efficiency is 40% higher than that achieved from the device using commercially available 150 nm indium tin oxide.
AB - Either side of organic photovoltaics incorporates a transparent conducting electrode for light entry, which becomes particularly crucial under indoor light conditions with low light intensity. However, since electrical resistivity and optical transparency with respect to film thickness are mutually contradictory, sufficiently thick (>150 nm) electrodes are inevitably required to ensure the appropriate electrical conductivity, at the sacrifice of transmittance. This paper introduces an electric field induced filament doping method to realize ultra-thin indium tin oxide with high conductivity. The proposed method allows for injecting metal dopants (i.e., Ni) into ultra-thin indium tin oxide under an electric field, enabling substantial resistance reduction while retaining high transmittance and low surface roughness. Optimum light absorption and effective carrier transport via filament doping provides improved performance for indoor organic photovoltaics. As a proof-of-principle demonstration, we fabricate poly(3-hexylthiophene):indene-C60 bisadduct based inverted organic photovoltaics with 10 nm Ni-doped indium tin oxide as a transparent cathode, leading to a power conversion efficiency of 14.6 ± 1.8% under the 1000-lux light-emitting diode. This efficiency is 40% higher than that achieved from the device using commercially available 150 nm indium tin oxide.
KW - Filament doping
KW - Indoor organic photovoltaics
KW - Sheet resistance
KW - Transmittance
KW - Ultra-thin indium tin oxide
UR - http://www.scopus.com/inward/record.url?scp=85063688827&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85063688827&partnerID=8YFLogxK
U2 - 10.1016/j.jpowsour.2019.03.116
DO - 10.1016/j.jpowsour.2019.03.116
M3 - Article
AN - SCOPUS:85063688827
VL - 424
SP - 165
EP - 175
JO - Journal of Power Sources
JF - Journal of Power Sources
SN - 0378-7753
ER -