Unusually High Thermal Stability of <em>pseudo</em>-Ternary Polymer Solar Cell Performance Enabled by Conjugated Donor Block Copolymer
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초록
내용
In this study, we synthesized a new donor block1 (D1) –donor block2 (D2) containing CBP (PM6-b-TT, D1–D2 CBP) by selecting PM6 as the first D1 and PBDT-TT as the second D2 via a reported one-pot polymerization strategy. PM6-b-TT, which exhibits an extended absorption range, was synthesized by covalently bonding PM6 with PBDT-TT. The corresponding pseudo-ternary PSC exhibited significantly higher PCE and thermal stability than the PM6:PBDT-TT-based ternary device. This study unambiguously demonstrates that the novel D1–D2 CBP strategy, combined with the conventional binary and ternary system advantages, is a promising material production strategy that can boost the performance of future PSCs.