Department of Chemical and Biomolecular Engineering
Korea Advanced Institute of Science and Technology

Recent Achievements

제목

[Inside Front Cover] Controlling Molecular Orientation of Naphthalenediimide-Based Polymer Acceptors for High Performance All-Polymer Solar Cells

Controlling Molecular Orientation of Naphthalenediimide-Based Polymer Acceptors for HighPerformance All-Polymer Solar Cells

 

Author: Jihye Jung, Wonho Lee, Changyeon Lee, Hyungju Ahn, Bumjoon J.Kim

 

Journal: Advanced Energy Materials DOI: 10.1002/aen,.201600504


 [ABSTRACT]


Molecular orientation, with respect to donor/acceptor interface andelectrodes, plays a critical role in determining the performance of all-polymersolar cells (all-PSCs), but is often difficult to rationally control. Here, aneffective approach for tuning the molecular crystallinity and orientation ofnaphthalenediimide-bithiophene-based n-type polymers (P(NDI2HD-T2)) bycontrolling their number average molecular weights (Mn) is reported. A series of P(NDI2HD-T2)polymers with different Mn of13.6 (PL),22.9 (PM),and 49.9 kg mol1 (PH) are prepared by changingthe amount of end-capping agent (2-bromothiophene) during polymerization.Increasing the Mn values ofP(NDI2HD-T2) polymers leads to a remarkable shift of dominant lamellarcrystallite textures from edge-on (PL) to face-on (PH) as well as more than a twofold increase in thecrystallinity. For example, the portion of face-on oriented crystallites isdramatically increased from 21.5% and 46.1%, to 78.6% for PLPM, and PH polymers. Thesedifferent packing structures in terms of the molecular orientation greatlyaffect the charge dissociation efficiency at the donor/acceptor interface andthus the short-circuit current density of the all-PSCs. All-PSCs with PTB7-Thas electron donor and PH as electron acceptor show the highest efficiencyof 6.14%, outperforming those with PM (5.08%) and PL (4.29%).




0

추천하기

0

반대하기

첨부파일 다운로드

등록자관리자

등록일2016-09-22

조회수1,287

  • 페이스북 공유
  • 트위터 공유
  • Google+ 공유
  • 인쇄하기
 
스팸방지코드 :
사진제목
Title:  A simple and eco-friendly one-pot synthesis of nuclease-resistant DNA-inorganic hybrid nanoflowers   Author: Ki Soo Park, Bhagwan S Batule, Minsoo Chung, Kyoung Suk Kang, Tae Jung Park, Moon Il Kim and Hyun Gyu Park*   Journal: Journal of Material Chemistry B, 2017, 5, 2231-2234   Abstract: A simple and eco-friendly method has b...
Title: Polyketide bio-derivatization using the promiscuous acyltransferase KirCII Author: Musiol-Kroll, E.M., Zubeil, F., Schafhauser, T., Hartner, T., Kulik, A., McArthur, J., Koryakina, I., Wohlleben, W., Grond, S., Williams, G.J., Lee, S.Y., and Weber, T. Journal: ACS Synth. Biol., 2017, 6 (3), pp 421–427   Abstract: During polyketide bios...
Title: Structure and function of the N-terminal domain of Ralstonia eutropha polyhydroxyalkanoate synthase, and the proposed structure and mechanisms of the whole enzyme Author: Kim, Y-J., Choi, S.Y., Kim, J.E., Jin, K.S., Lee, S.Y., Kim, K-J. Journal: Biotechnol. J., 12(1):  1-12 (2017. 1) Abstract: Polyhydroxyalkanoates (PHAs) are natural...
Title: Crystal structure of Ralstonia eutrophapolyhydroxyalkanoate synthase C-terminal domain and reaction mechanismsAuthor: Kim, J.E., Kim, Y-J., Choi, S.Y., Lee, S.Y.,Kim, K-J.Journal: Biotechnol. J., 12(1):  1-12(2017. 1)Abstract:Polyhydroxyalkanoates(PHAs) are natural polyesters synthesized by numerous microorganisms as energyand reducing power storage materials, and h...
Title: Biosynthesis of poly(2-hydroxyisovalerate-co-lactate) by metabolically engineered Escherichia coli   Author: Yang, J.E., Kim, J.W., Oh, Y.H., Choi, S.Y., Lee, H., Park, A.-R., Shin, J., Park, S.J., and Lee, S.Y.  Journal: Biotechnol. J. , 11(12): 1572-1585 (2016. 12)  Abstract: Polyhydroxyalkanoates (PHAs) containing 2-hydroxy...