TY  - JOUR
AU  - Zhang, Zesheng
AU  - Kong, Lingchen
AU  - Wang, Xinkang
AU  - Wang, Rong
AU  - Tang, Hua
AU  - Chen, Mingqing
AU  - Yang, Yuntong
AU  - Zhang, Lianjie
AU  - Fu, Yuang
AU  - Lu, Xinhui
AU  - Ma, Dongge
AU  - Lüer, Larry
AU  - Liu, Chao
AU  - Brabec, Christoph
AU  - Chen, Junwu
TI  - Cold‐Sublimating Quasi‐Solid Additive Enables High Efficiency and Long Operational Stability Binary Organic Solar Cells
JO  - Advanced energy materials
VL  - 16
IS  - 5
SN  - 1614-6832
CY  - Weinheim
PB  - Wiley-VCH
M1  - FZJ-2025-05103
SP  - e05276
PY  - 2026
AB  - Controlling activelayer morphology during drying is pivotal for the simultaneous realization of high efficiency and durability in Yseries organic solar cells (OSCs). Here, we uncover how the physical state of in situ removable (ISR) isomeric additives, oDF (liquid), mDF (quasisolid), and pDF (solid), governs film formation, molecular ordering, and device stability in binary OSCs. Among them, quasisolid mDF functions as a coldsublimating transient structuring agent: it widens earlystage solvent removal window yet accelerates intermediate crystallization, tightens π–π stacking, enlarges coherence length, and programs a favorable vertical phase separation, as resolved by in situ UV–vis, GIWAXS, and depthprofiled spectroscopy. mDF interacts most strongly with L8-BO while fully evaporating from the film, minimizing nonradiative losses and avoiding the adverse impact of residual additives on device stability. Consequently, PM6:L8BO devices reach 19.28% PCE with improved carrier mobility and suppressed trapassisted recombination; applying mDF to D18:L8BO yields 20.08%. Under 1sun illumination at 70 °C, mDF extends operational stability to T80 = 477 h, outperforming oDF (58 h), pDF (279 h), and additivefree control (103 h). These results establish physicalstateprogrammed ISR additives as a general route to cooptimize efficiency and stability in OSCs and provide mechanistic guidance for scalable, residuefree morphology control.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:001626762000001
DO  - DOI:10.1002/aenm.202505276
UR  - https://juser.fz-juelich.de/record/1049008
ER  -