TY - JOUR
T1 - Single-layer organic photovoltaics fabricated via solution-based electrical doping of ternary bulk heterojunction films
AU - Nam, Minwoo
AU - Park, Youngrak
AU - Lee, Chihyung
AU - Kim, Gunhee
AU - Larrain, Felipe A.
AU - Fuentes-Hernandez, Canek
AU - Ko, Doo Hyun
AU - Kippelen, Bernard
N1 - Funding Information:
M.N. and Y.P. contributed equally to this work. This work was supported in part by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2021R1G1A1004103, No. 2020R1A2C2005844, No. 2021R1A4A1030449) and through the named Pettit Professorship in the School of Electrical and Computer Engineering at Georgia Tech. C.F-H. acklowledges the support of Northeastern University. F.A.L. acknowledges the support of CONICYT (Chilean National Commission for Scientific and Technological Research) through the Doctoral Fellowship program “Becas Chile”, Grant No. 72150387.
Funding Information:
M.N. and Y.P. contributed equally to this work. This work was supported in part by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2021R1G1A1004103 , No. 2020R1A2C2005844 , No. 2021R1A4A1030449 ) and through the named Pettit Professorship in the School of Electrical and Computer Engineering at Georgia Tech. C.F-H. acklowledges the support of Northeastern University. F.A.L. acknowledges the support of CONICYT (Chilean National Commission for Scientific and Technological Research ) through the Doctoral Fellowship program “Becas Chile”, Grant No. 72150387 .
Publisher Copyright:
© 2023 Elsevier B.V.
PY - 2023/6/15
Y1 - 2023/6/15
N2 - The commercial viability of organic photovoltaics (OPVs) can be improved by simplifying their device geometry and easing fabrication complexity. Here, we demonstrate that solution-based p-type electrical doping of ternary bulk heterojunction (BHJ) films, which comprise 2 donor polymers and 1 fullerene acceptor (2D:1A), enables the realization of efficient single-layer OPVs. Systematic and detailed investigations of the optoelectronic characteristics of films with varying donor ratios, and their photovoltaic performance, demonstrate p-type electrical doping via post-process immersion into a 12-molybdophosphoric acid hydrate (PMA) solution, resulting in a reduced trap density and charge recombination without significantly changing the BHJ morphology. Furthermore, PMA doping of films comprising optimized ternary blend compositions and polyethylenimine enables the demonstration of single-layer OPVs with economic top electrode metals and a high level of performance under outdoor and indoor illumination conditions. These PMA-doped 2D:1A BHJ films are an attractive platform to reduce the efficiency-cost gap and accelerate the commercialization of OPVs for emerging applications.
AB - The commercial viability of organic photovoltaics (OPVs) can be improved by simplifying their device geometry and easing fabrication complexity. Here, we demonstrate that solution-based p-type electrical doping of ternary bulk heterojunction (BHJ) films, which comprise 2 donor polymers and 1 fullerene acceptor (2D:1A), enables the realization of efficient single-layer OPVs. Systematic and detailed investigations of the optoelectronic characteristics of films with varying donor ratios, and their photovoltaic performance, demonstrate p-type electrical doping via post-process immersion into a 12-molybdophosphoric acid hydrate (PMA) solution, resulting in a reduced trap density and charge recombination without significantly changing the BHJ morphology. Furthermore, PMA doping of films comprising optimized ternary blend compositions and polyethylenimine enables the demonstration of single-layer OPVs with economic top electrode metals and a high level of performance under outdoor and indoor illumination conditions. These PMA-doped 2D:1A BHJ films are an attractive platform to reduce the efficiency-cost gap and accelerate the commercialization of OPVs for emerging applications.
KW - Electrical doping
KW - Indoor energy harvesting
KW - Organic photovoltaics
KW - Phosphomolybdic acid
KW - Single-layer geometry
KW - Ternary bulk heterojunction
UR - http://www.scopus.com/inward/record.url?scp=85158032425&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2023.143340
DO - 10.1016/j.cej.2023.143340
M3 - Article
AN - SCOPUS:85158032425
SN - 1385-8947
VL - 466
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
M1 - 143340
ER -
