Unveiling the Morphological and Physical Mechanism of Burn‐in Loss Alleviation by Ternary Matrix Toward Stable and Efficient All‐Polymer Solar Cells

• DOI: 10.1002/adma.202212275
• Publication Date: 2023-02-10T08:47:51Z
• Authors: Ruijie Ma; Qunping Fan; Top Archie Dela Peña; Baohua Wu; Heng Liu; Qiang Wu; Qi Wei; Jiaying Wu; Xinhui Lu; Mingjie Li; Wei Ma; Gang Li
• Keywords: Matrix (chemical analysis); Ternary numeral system

All-polymer solar cells (All-PSCs) are considered the most promising candidate in achieving both efficient and stable organic photovoltaic devices, yet field has rarely presented an in-depth understanding of corresponding device stability while efficiency is continuously boosted via innovation polymer acceptors. Herein, a ternary matrix built for all-PSCs with optimized morphology, improved film ductility importantly, better operational than its parental binary counterparts, as platform to study underlying mechanism. The target system PQM-Cl:PTQ10:PY-IT (0.8:0.2:1.2) exhibits alleviated burn-in loss morphology under light soaking, which supports promoted lifetime. comprehensive characterizations fresh light-soaked active layers lead clear illustration opposite morphological physical degradation direction PQM-Cl PTQ10, thus resulting delicate balance at optimal system. Specifically, enlarging tendency shrinking preference PTQ10 terms phase separation leads their mixing phase; hole transfer kinetics PQM-Cl:PY-IT host stabilized by incorporating PTQ10. This work succeeds reaching deep insight into all-PSC's promotion rational design, booms prospect gaining high-performance all-PSCs.