| 학회 |
한국화학공학회 |
| 학술대회 |
2022년 봄 (04/20 ~ 04/23, 제주국제컨벤션센터) |
| 권호 |
28권 1호, p.653 |
| 발표분야 |
[주제 9] 에너지 전환 |
| 제목 |
Flexible Conjugation Breaking Spacer Embedded Polymer Donors Enable Superior Blend Miscibility for High-Performance and Mechanically-Robust Polymer Solar Cells |
| 초록 |
Developing polymer solar cells (PSCs) with good photovoltaic/mechanical properties is an urgent task to ensure their operational reliability in wearable devices. However, it remains challenging to enhance the mechanical properties without compromising the electrical properties of photoactive materials. Here, we develop a series of high-performance polymer donors (PDs) with with remarkable mechanical reliability. By interposing controlled amount of flexible spacers (FSs) into PM6 backbone, we are able to significantly enhance the intermixing of the new PDs with small molecule acceptor (Y7), affording sufficient pathways for efficient charge percolation and mechanical stress dissipation. As a result, PSCs based on the PD containing 5 mol% FS unit and Y7 exhibit a high power conversion efficiency (PCE) of 17% with a crack onset strain (COS) of 12% and a cohesive fracture energy (Gc) of 2.1 J m–2, significantly outperforming the reference PM6-based devices (PCE = 15%, COS = 2% and Gc= 1.0 J m–2). The rational design of PDs presents their viable application in wearable electronics. |
| 저자 |
이승진, 이진우, 정다현, 김동준, 김택수, 김범준
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| 소속 |
KAIST |
| 키워드 |
에너지 환경(Energy and Environment) |
| E-Mail |
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| 원문파일 |
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