TY - JOUR
T1 - Layered optimization strategy enables over 17.8% efficiency of layer-by-layer organic photovoltaics
AU - Ma, Xiaoling
AU - Jiang, Qiuju
AU - Xu, Wenjing
AU - Xu, Chunyu
AU - Young Jeong, Sang
AU - Young Woo, Han
AU - Wu, Qinghe
AU - Zhang, Xiaoli
AU - Yuan, Guangcai
AU - Zhang, Fujun
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China (62105017, 61975006 and 62175011), the Postdoctoral Innovative Talent Support Program (BX20200042), the China Postdoctoral Science Foundation (2020M680327) and Beijing Natural Science Foundation (4192049).
Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/8/15
Y1 - 2022/8/15
N2 - In this work, layer-by-layer (LbL) type OPVs are constructed with wide bandgap polymer PNTB6-Cl as donor and nonfullerene material BTP-4F-12 as acceptor. The layered optimization strategy is employed via separately incorporating the diphenyl ether (DPE) and 1,8-diiodooctane (DIO) into PNTB6-Cl chlorobenzene solution and BTP-4F-12 chloroform solution. A power conversion efficiency (PCE) of 17.81% was achieved from the optimal LbL type OPVs with two solvent additives, which should be among the top level for LBL type binary OPVs. The incorporation of DPE and DIO can separately induce more ordered PNTB6-Cl and BTP-4F-12 orientation, which should contribute to charge transport with suppressed charge recombination in active layers. Meanwhile, BTP-4F-12 crystallization is strongly increased with the incorporation of DIO, which should facilitate more swell matrix for exciton diffusion in active layers. Over 13% PCE improvement can be realized in LbL type OPVs by incorporating two additives, benefiting from simultaneously improved short circuit current density (JSC) of 26.89 mA cm−2 and fill factor (FF) of 75.79%. Meanwhile, the PCE of optimized LbL type OPVs is higher than that of 17.33% for the optimized OPVs with bulk-heterojunction (BHJ) configuration, which reveals that layered optimization strategy should be a promising approach to achieve highly efficient LbL type OPVs.
AB - In this work, layer-by-layer (LbL) type OPVs are constructed with wide bandgap polymer PNTB6-Cl as donor and nonfullerene material BTP-4F-12 as acceptor. The layered optimization strategy is employed via separately incorporating the diphenyl ether (DPE) and 1,8-diiodooctane (DIO) into PNTB6-Cl chlorobenzene solution and BTP-4F-12 chloroform solution. A power conversion efficiency (PCE) of 17.81% was achieved from the optimal LbL type OPVs with two solvent additives, which should be among the top level for LBL type binary OPVs. The incorporation of DPE and DIO can separately induce more ordered PNTB6-Cl and BTP-4F-12 orientation, which should contribute to charge transport with suppressed charge recombination in active layers. Meanwhile, BTP-4F-12 crystallization is strongly increased with the incorporation of DIO, which should facilitate more swell matrix for exciton diffusion in active layers. Over 13% PCE improvement can be realized in LbL type OPVs by incorporating two additives, benefiting from simultaneously improved short circuit current density (JSC) of 26.89 mA cm−2 and fill factor (FF) of 75.79%. Meanwhile, the PCE of optimized LbL type OPVs is higher than that of 17.33% for the optimized OPVs with bulk-heterojunction (BHJ) configuration, which reveals that layered optimization strategy should be a promising approach to achieve highly efficient LbL type OPVs.
KW - Layer-by-layer
KW - Molecular arrangement
KW - Organic photovoltaics
KW - Photon harvesting
KW - Solvent additive
UR - http://www.scopus.com/inward/record.url?scp=85128373165&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2022.136368
DO - 10.1016/j.cej.2022.136368
M3 - Article
AN - SCOPUS:85128373165
SN - 1385-8947
VL - 442
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
M1 - 136368
ER -