Synthesis and structural characterization of molecular weights-controlled naphthalene diimide-based polymer = 분자량이 조절된 나프탈렌 다이이미드 계 고분자 합성 및 구조적 특성 변화에 관한 연구

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Molecular orientation, with respect to donor/acceptor interface and electrodes, plays a critical role in determining the performance of all-polymer solar cells (all-PSCs) but is often difficult to rationally control. Here, an effective approach for tuning the molecular crystallinity and orientation of naphthalene diimide-bithiophene-based n-type polymers (P(NDI2HD-T2)) by controlling their number average molecular weights ($M_n$) is reported. Increasing the $M_n$ values of P(NDI2HD-T2) polymers leads to a remarkable shift of dominant lamellar crystallite textures from edge-on to face-on as well as more than a twofold increase in the crystallinity. These different packing structures in terms of the molecu-lar orientation greatly affect the charge dissociation efficiency at the donor/acceptor interface and thus the short-circuit current density of the all-PSCs. All-PSCs with PTB7-Th as electron donor and high molecular weight electron acceptor show the highest efficiency of 6.14%.
Advisors
Kim, Bumjoonresearcher김범준researcher
Description
한국과학기술원 :생명화학공학과,
Publisher
한국과학기술원
Issue Date
2016
Identifier
325007
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 생명화학공학과, 2016.8,[iii, 52 p. :]

Keywords

all-polymer solar cells▼amolecular orientation▼amolecular weight▼an-type conjugated polymer▼anaphthalene diimide; 전-고분자 태양전지▼a분자 방향▼a분자량▼an타입 전도성 고분자▼a나프탈렌 다이이미드

URI
http://hdl.handle.net/10203/266298
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=849891&flag=dissertation
Appears in Collection
CBE-Theses_Master(석사논문)
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