DC Field | Value | Language |
---|---|---|
dc.contributor.author | Han, Yunghee | - |
dc.date.accessioned | 2023-06-23T19:31:24Z | - |
dc.date.available | 2023-06-23T19:31:24Z | - |
dc.date.issued | 2022 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=1000337&flag=dissertation | en_US |
dc.identifier.uri | http://hdl.handle.net/10203/308830 | - |
dc.description | 학위논문(석사) - 한국과학기술원 : 생명화학공학과, 2022.2,[iii, 35 p. :] | - |
dc.description.abstract | Recently, all-polymer solar cells (all-PSCs) have been in the spotlight for their stretchable and extendable potential to wearable electronics. For practical applications, not only high efficiency but also mechanical robustness of the device is considered as important factors. From this point of view, a technical strategy incorporating a flexible conjugation-break spacer (FCBS) has been reported to achieve mechanically robust and high efficient all-PSCs. The incorporation of FCBS increases both the mechanical properties and photovoltaic performances of all-PSCs by effectively controlling the crystallinity and pre-aggregation of the polymer acceptors ($P_A$s), and achieving an optimal blend morphology with polymer donor. In this study, we report the optimal alkyl linker length point at the $P_A$s. The all-PSC based on PYTS-C2 as a $P_A$ and a polymer donor (PBDB-T) shows a high power conversion efficiency (PCE) of 11.37%, superior mechanical stretchability with a crack onset strain (COS) of 12.39% and toughness of 2.09 $MJ$ $m^{-3}$, which is significantly improved compared to those of devices with the $P_A$s without FCBS (PYT-C0 : PCE = 5.15% and COS = 2.75%) or with the longer length of FCBS (PYTS-C4 : PCE = 3.28%, COS = 0.68%, PYTS-C8 : PCE = 3.17% and COS = 0.45%). These results demonstrate that the incorporation of the proper length of FCBS into the conjugated backbone is highly feasible approach to simultaneously enhance the PCE and stretchability of all-PSCs. | - |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | Polymer acceptor▼aNon-conjugated alkyl linker▼aMechanical property▼aAll-polymer solar cell | - |
dc.subject | 고분자 전자 받개▼a알킬 사슬 링커▼a기계적 안정성▼a전고분자 유기태양전지 | - |
dc.title | Development of efficient and mechanically stable polymer acceptors for all-polymer solar cells via incorporation of flexible alkyl segments | - |
dc.title.alternative | 알킬 사슬 도입을 통한 기계적으로 안정한 전고분자 태양전지용 고효율 고분자 전자 받개 개발에 대한 연구 | - |
dc.type | Thesis(Master) | - |
dc.identifier.CNRN | 325007 | - |
dc.description.department | 한국과학기술원 :생명화학공학과, | - |
dc.contributor.alternativeauthor | 한융희 | - |
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