DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | 김범준 | - |
dc.contributor.author | Jeon, Hyesu | - |
dc.contributor.author | 전혜수 | - |
dc.date.accessioned | 2024-07-30T19:31:05Z | - |
dc.date.available | 2024-07-30T19:31:05Z | - |
dc.date.issued | 2024 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=1096700&flag=dissertation | en_US |
dc.identifier.uri | http://hdl.handle.net/10203/321483 | - |
dc.description | 학위논문(석사) - 한국과학기술원 : 생명화학공학과, 2024.2,[iii, 45p. :] | - |
dc.description.abstract | The simultaneous achievement of a high-power conversion efficiency (PCE) and long-term stability is essential for the commercialization of organic solar cells (OSCs). Conventionally, polymer donor and small molecule acceptor (SMA) are key components in active layer for achieving high power conversion efficiency (PCE) in OSCs. However, efficient OSCs based on SMAs typically show poor stability mainly because of morphological deterioration caused by the fast diffusion of SMA molecules during the thermal- and photo-stresses. To address this issue effectively, it is crucial to conduct a comprehensive investigation in dimerized SMA (DSMA), which is an efficient structure to attain both enhanced stability and efficiency. In this study, two DSMAs comprising selenophene spacers with different regio-positions, DYSe-I and DYSe-O, are developed to achieve efficient and thermally stable OSCs. The different regio-positions in DSMAs have a substantial effect on various molecular properties. DYSe-I possesses a more planar backbone conformation and more continuously connected conjugation than DYSe-O. Consequently, DYSe-I exhibits a relatively higher crystallinity, electron mobility, and glass transition temperature. These favorable features of DYSe-I lead to a higher PCE (16.8%) and thermal stability (t80% lifetime = 514 h) in the resulting OSCs, surpassing those of the DYSe-O-based devices (PCE = 14.0% and t80% lifetime = 115 h). | - |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | 이량체 전자 받개▼a구조이성질체▼a유기태양전지▼a주쇄▼a열적안정성 | - |
dc.subject | Dimerized small molecule acceptor▼aRegioisomer▼aOrganic solar cell▼aBackbone planarity▼aCrystallinity▼aThermal stability | - |
dc.title | Linker engineering of dimerized small molecule acceptors for efficient and stable organic solar cells | - |
dc.title.alternative | 이량체 전자 받개 링커 개질에 따른 고효율 고안정성 유기태양전지 개발에 대한 연구 | - |
dc.type | Thesis(Master) | - |
dc.identifier.CNRN | 325007 | - |
dc.description.department | 한국과학기술원 :생명화학공학과, | - |
dc.contributor.alternativeauthor | Kim, Bumjoon | - |
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