TY - JOUR
T1 - Side-Chain Engineering in ITIC Skeleton Enabling As-Cast Organic Solar Cells with Reduced Energy Loss and Improved Vertical Phase Distribution
AU - Zhu, Jintao
AU - Lv, Li
AU - Dai, Tingting
AU - Pan, Run
AU - Wang, Fan
AU - Yang, Jiaqi
AU - Do, Hainam
AU - Zhou, Erjun
AU - Chen, Zhi Kuan
AU - Chen, Fei
N1 - Publisher Copyright:
© 2024 American Chemical Society
PY - 2024/6/3
Y1 - 2024/6/3
N2 - Constructing binary organic solar cells (OSCs) with remarkable open-circuit voltage (VOC) as well as suppressed energy loss (ELoss) has been considered a promising strategy for breaking the efficiency bottleneck for OSCs. In this work, two novel chlorinated fused-ring electron acceptors were designed and synthesized through side-chain engineering, of which the rotation of end-capping groups on the indenedithiene [3,2-b] thiophene core was effectively restricted. Benefiting from the conformation lock, the IMC6-4Cl and IMC8-4Cl binary donor/acceptor (D/A) blend films realized more ordered molecular stacking and reduced Urbach energy, leading to lower ELoss of the devices. Moreover, the prolonged side chains in IMC8-4Cl inhibited excessive aggregation of the molecules and facilitated better miscibility with D18. Therefore, the D18:IMC8-4Cl blend films exhibited more rational D/A phase separation and reduced energy disorder. Eventually, the D18:IMC8-4Cl based devices achieved an exceptional power conversion efficiency of 13.99% and a decent VOC of 0.97 eV.
AB - Constructing binary organic solar cells (OSCs) with remarkable open-circuit voltage (VOC) as well as suppressed energy loss (ELoss) has been considered a promising strategy for breaking the efficiency bottleneck for OSCs. In this work, two novel chlorinated fused-ring electron acceptors were designed and synthesized through side-chain engineering, of which the rotation of end-capping groups on the indenedithiene [3,2-b] thiophene core was effectively restricted. Benefiting from the conformation lock, the IMC6-4Cl and IMC8-4Cl binary donor/acceptor (D/A) blend films realized more ordered molecular stacking and reduced Urbach energy, leading to lower ELoss of the devices. Moreover, the prolonged side chains in IMC8-4Cl inhibited excessive aggregation of the molecules and facilitated better miscibility with D18. Therefore, the D18:IMC8-4Cl blend films exhibited more rational D/A phase separation and reduced energy disorder. Eventually, the D18:IMC8-4Cl based devices achieved an exceptional power conversion efficiency of 13.99% and a decent VOC of 0.97 eV.
UR - http://www.scopus.com/inward/record.url?scp=85192156894&partnerID=8YFLogxK
U2 - 10.1021/acsmaterialslett.4c00287
DO - 10.1021/acsmaterialslett.4c00287
M3 - Article
AN - SCOPUS:85192156894
SN - 2639-4979
VL - 6
SP - 2100
EP - 2110
JO - ACS Materials Letters
JF - ACS Materials Letters
IS - 6
ER -