DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | 김범준 | - |
dc.contributor.author | Han, Daehee | - |
dc.contributor.author | 한대희 | - |
dc.date.accessioned | 2024-07-30T19:30:13Z | - |
dc.date.available | 2024-07-30T19:30:13Z | - |
dc.date.issued | 2023 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=1052062&flag=dissertation | en_US |
dc.identifier.uri | http://hdl.handle.net/10203/321238 | - |
dc.description | 학위논문(박사) - 한국과학기술원 : 생명화학공학과, 2023.2,[v, 118 p. :] | - |
dc.description.abstract | The organic solar cells (OSCs) have received great attention as renewable energy conversion devices owing to the solution processability, low-cost and light weight. Recently, the development of non-fullerene small molecule acceptors (NFSMAs) have improved power conversion efficiencies (PCEs) up to 18%. However, most high-performing polymer donors (P$_D$) feature complicated molecular structure and thus, it requires multi-synthetic steps and low yield impeding the roll-to-roll process for the large arear of OSCs. Furthermore, since the cross-coupling mechanism for high-performing P$_D$s is a step-wise poly condensation, it possesses difficulty to control the molecular weight and poly diversity index (PDI) resulting in unreliable OSC devices. In this respect, the poly(3-hexylthiophene) (P3HT) is one of the commercially viable P$_D$. Compared to traditional P$_D$, the P3HT prepared by chain-growth polymerization easily modulates the molecular weight and controls batch-to-batch variation. And also, the development of NFSMAs to be paired with P3HT have significantly enhanced PCE of P3HT based OSC up to 9%. Despite of successful enhancement in PCE, a designing NFSMA realizing high-performances and thermal stability have been considered as challenging issues.Especially, the NFSMAs have limited to possess high performances and thermal stability in the P3HT blend system. For example, non-oriented crystallites of the NFSMAs easily undergo re-oriented and re-crystallization under thermal stress due to their low low-glass transition temperatures (T$_g$s), resulting in degradation of OSC performances. Whereas, the fullerene-based acceptors easily secure the micro crystal structure by post-thermal treatment possessing high-electrical properties, the weak pi-pi interactions of NFSMA backbones lead difficulty to secure crystallinity in the P3HT blend. Accordingly, we designed and synthesized non-covalently fused ring acceptors for realizing efficient and thermally stable P3HT-based OSCs. In these contributions, we believe these works will provide important evidence the for commercialization of OSCs and the development of NFSMAs. | - |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | Organic solar cell▼aPoly(3-hexylthiophene)▼aNon-fullerene small-molecule acceptor▼aThermal stability | - |
dc.subject | 유기 태양전지▼a폴리(3-헥실 티오펜)▼a비-풀러렌 단분자 수용체▼a열 안정성 | - |
dc.title | Development of non-fullerene small-molecule acceptor for efficient poly(3-Hexylthiophene)-based organic solar cell | - |
dc.title.alternative | 고성능 폴리(3-헥실티오펜)기반의 유기태양전지를 위한 비-풀러렌 기반의 단분자 수용체 개발 | - |
dc.type | Thesis(Ph.D) | - |
dc.identifier.CNRN | 325007 | - |
dc.description.department | 한국과학기술원 :생명화학공학과, | - |
dc.contributor.alternativeauthor | Kim, Bumjoon | - |
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