TY - JOUR
T1 - Two Completely Non-Fused Ring Acceptors Working in an Alloy-Like Model for Efficient and Stable Organic Solar Cells
AU - Han, Chenyang
AU - Gao, Huanhuan
AU - Kan, Yuanyuan
AU - Zhang, Xu
AU - Jiang, Xinyue
AU - Shen, Can
AU - Ni, Liaohui
AU - Lv, Zekun
AU - Zhang, Zhan
AU - Wang, Lei
AU - Zapien, Juan Antonio
AU - Yang, Yingguo
AU - Sun, Yanna
AU - Gao, Ke
PY - 2024/5/3
Y1 - 2024/5/3
N2 - Simple chemical structure and simplified synthesis process of active layer materials are critical for advancing the practical application of organic solar cells. Herin, two completely non-fused ring electron acceptors BTZT-2Cl and BTZT-4Cl are developed. BTZT-4Cl exhibits an enhanced absorption band, increases electrostatic potential differences with D18, and improves crystallinity and molecular packing properties. Consequently, the binary device based on BTZT-4Cl displays a markedly improved efficiency of 14.12%, compared to the BTZT-2Cl-based device, which only achieves a moderate efficiency of 11.25%. More importantly, an alloy-like structure can be formed by incorporating a small amount of high miscibility and compatibility BTZT-2Cl. The ternary blend exhibits more compact molecular packing, efficient exciton dissociation, and an extended charge carrier lifetime due to the formation of an alloy-like structure. The ternary device achieves a decent efficiency of 15.41% with superior thermal stability and a high T80 lifetime over 1600 h after being aged at 65 °C. These results establish it as the most efficient among devices based on completely non-fused ring acceptors with both high efficiency and voltage. This study demonstrates a simple material design strategy and high-performance device optimization techniques, which are critical for advancing practical applications in the OSC field. © 2024 Wiley-VCH GmbH.
AB - Simple chemical structure and simplified synthesis process of active layer materials are critical for advancing the practical application of organic solar cells. Herin, two completely non-fused ring electron acceptors BTZT-2Cl and BTZT-4Cl are developed. BTZT-4Cl exhibits an enhanced absorption band, increases electrostatic potential differences with D18, and improves crystallinity and molecular packing properties. Consequently, the binary device based on BTZT-4Cl displays a markedly improved efficiency of 14.12%, compared to the BTZT-2Cl-based device, which only achieves a moderate efficiency of 11.25%. More importantly, an alloy-like structure can be formed by incorporating a small amount of high miscibility and compatibility BTZT-2Cl. The ternary blend exhibits more compact molecular packing, efficient exciton dissociation, and an extended charge carrier lifetime due to the formation of an alloy-like structure. The ternary device achieves a decent efficiency of 15.41% with superior thermal stability and a high T80 lifetime over 1600 h after being aged at 65 °C. These results establish it as the most efficient among devices based on completely non-fused ring acceptors with both high efficiency and voltage. This study demonstrates a simple material design strategy and high-performance device optimization techniques, which are critical for advancing practical applications in the OSC field. © 2024 Wiley-VCH GmbH.
KW - alloy-like structure
KW - fully non-fused ring acceptors
KW - high efficiency
KW - morphology control
KW - organic solar cells
UR - http://www.scopus.com/inward/record.url?scp=85187515874&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85187515874&origin=recordpage
U2 - 10.1002/aenm.202304063
DO - 10.1002/aenm.202304063
M3 - RGC 21 - Publication in refereed journal
SN - 1614-6832
VL - 14
JO - Advanced Energy Materials
JF - Advanced Energy Materials
IS - 17
M1 - 2304063
ER -
