TY - JOUR
T1 - Rational molecular and device design enables organic solar cells approaching 20% efficiency
AU - Fu, Jiehao
AU - Yang, Qianguang
AU - Huang, Peihao
AU - Chung, Sein
AU - Cho, Kilwon
AU - Kan, Zhipeng
AU - Liu, Heng
AU - Lu, Xinhui
AU - Lang, Yongwen
AU - Lai, Hanjian
AU - He, Feng
AU - Fong, Patrick W.K.
AU - Lu, Shirong
AU - Yang, Yang
AU - Xiao, Zeyun
AU - Li, Gang
N1 - Publisher Copyright:
© The Author(s) 2024.
PY - 2024/2/28
Y1 - 2024/2/28
N2 - For organic solar cells to be competitive, the light-absorbing molecules should simultaneously satisfy multiple key requirements, including weak-absorption charge transfer state, high dielectric constant, suitable surface energy, proper crystallinity, etc. However, the systematic design rule in molecules to achieve the abovementioned goals is rarely studied. In this work, guided by theoretical calculation, we present a rational design of non-fullerene acceptor o-BTP-eC9, with distinct photoelectric properties compared to benchmark BTP-eC9. o-BTP-eC9 based device has uplifted charge transfer state, therefore significantly reducing the energy loss by 41 meV and showing excellent power conversion efficiency of 18.7%. Moreover, the new guest acceptor o-BTP-eC9 has excellent miscibility, crystallinity, and energy level compatibility with BTP-eC9, which enables an efficiency of 19.9% (19.5% certified) in PM6:BTP-C9:o-BTP-eC9 based ternary system with enhanced operational stability.
AB - For organic solar cells to be competitive, the light-absorbing molecules should simultaneously satisfy multiple key requirements, including weak-absorption charge transfer state, high dielectric constant, suitable surface energy, proper crystallinity, etc. However, the systematic design rule in molecules to achieve the abovementioned goals is rarely studied. In this work, guided by theoretical calculation, we present a rational design of non-fullerene acceptor o-BTP-eC9, with distinct photoelectric properties compared to benchmark BTP-eC9. o-BTP-eC9 based device has uplifted charge transfer state, therefore significantly reducing the energy loss by 41 meV and showing excellent power conversion efficiency of 18.7%. Moreover, the new guest acceptor o-BTP-eC9 has excellent miscibility, crystallinity, and energy level compatibility with BTP-eC9, which enables an efficiency of 19.9% (19.5% certified) in PM6:BTP-C9:o-BTP-eC9 based ternary system with enhanced operational stability.
UR - http://www.scopus.com/inward/record.url?scp=85186172651&partnerID=8YFLogxK
U2 - 10.1038/s41467-024-46022-3
DO - 10.1038/s41467-024-46022-3
M3 - Journal article
C2 - 38418862
AN - SCOPUS:85186172651
SN - 2041-1723
VL - 15
JO - Nature Communications
JF - Nature Communications
IS - 1
M1 - 1830
ER -