TY - JOUR
T1 - Complementary absorbing ternary blend containing structural isomeric donor polymers for improving the performance of PC61BM-based indoor photovoltaics
AU - Chau, Hong Diem
AU - Kwon, Na Yeon
AU - Park, Su Hong
AU - Hwang, Jinhyo
AU - Kataria, Meenal
AU - Harit, Amit Kumar
AU - Woo, Han Young
AU - Cho, Min Ju
AU - Choi, Dong Hoon
N1 - Funding Information:
The authors acknowledge the financial support from the National Research Foundation of Korea (NRF-2019R1A2C2002647, and 2019R1A6A1A11044070). We are grateful to the Pohang Accelerator Laboratory (Pohang, Korea) for allowing to conduct the grazing incidence wide-angle X-ray diffraction measurements (GIWAXD), the Institute for Basic Science (IBS, Korea) for allowing us to obtain nuclear magnetic resonance data (NMR; Ascend 500, Bruker) and Korea Basic Science Institute (Seoul) for allowing us to obtain the TEM data. The Korea Basic Science Institute (Seoul) is acknowledged for the MALDI-TOF MS data.
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/4/14
Y1 - 2021/4/14
N2 - In this study, two structural isomeric polymers, TTE36 and TTE25, were synthesized and their photophysical properties and photovoltaic device performance were investigated. Because of the different linking positions of carboxylate in their thienothiophene unit, these polymers can be classified as two isomers and exhibit significantly different properties. A mixture of these two polymers was effectively applied as the donor for a highly reliable active layer in organic indoor photovoltaics (IPVs) because of its good miscibility, and especially, of its broad complementary absorption which overlapped the emission spectrum of the white light-emitting diode lamp. The ternary IPV system, achieved by mixing the wide-bandgap TTE25 polymer with the medium-bandgap TTE36 polymer, followed by blending with [6,6]-phenyl-C61-butyric acid methyl ester (PC61BM), exhibited significantly enhanced open circuit voltage and short circuit current density, thus improving the power conversion efficiency (PCE) of the IPV system. Compared to the TTE36:PC61BM-binary-blend-based IPV system, the TTE36:TTE25:PC61BM (0.8:0.2:1.0 wt ratio)-ternary-blend-based IPV system exhibited an increase in PCE from 6.81% to 11.15% under 1000 lux white LED light illumination. These results indicate that the addition of TTE25 to the TTE36:PC61BM binary blend improves the morphology and light-harvesting properties of the active layer.
AB - In this study, two structural isomeric polymers, TTE36 and TTE25, were synthesized and their photophysical properties and photovoltaic device performance were investigated. Because of the different linking positions of carboxylate in their thienothiophene unit, these polymers can be classified as two isomers and exhibit significantly different properties. A mixture of these two polymers was effectively applied as the donor for a highly reliable active layer in organic indoor photovoltaics (IPVs) because of its good miscibility, and especially, of its broad complementary absorption which overlapped the emission spectrum of the white light-emitting diode lamp. The ternary IPV system, achieved by mixing the wide-bandgap TTE25 polymer with the medium-bandgap TTE36 polymer, followed by blending with [6,6]-phenyl-C61-butyric acid methyl ester (PC61BM), exhibited significantly enhanced open circuit voltage and short circuit current density, thus improving the power conversion efficiency (PCE) of the IPV system. Compared to the TTE36:PC61BM-binary-blend-based IPV system, the TTE36:TTE25:PC61BM (0.8:0.2:1.0 wt ratio)-ternary-blend-based IPV system exhibited an increase in PCE from 6.81% to 11.15% under 1000 lux white LED light illumination. These results indicate that the addition of TTE25 to the TTE36:PC61BM binary blend improves the morphology and light-harvesting properties of the active layer.
KW - Complementary absorption
KW - Donor semiconducting polymer
KW - Indoor photovoltaics
KW - Structural isomeric polymer
KW - Ternary blend
UR - http://www.scopus.com/inward/record.url?scp=85102351676&partnerID=8YFLogxK
U2 - 10.1016/j.polymer.2021.123606
DO - 10.1016/j.polymer.2021.123606
M3 - Article
AN - SCOPUS:85102351676
VL - 221
JO - Polymer (United Kingdom)
JF - Polymer (United Kingdom)
SN - 0032-3861
M1 - 123606
ER -