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

Recent Achievements

제목

[cover picture] Design of Cyanovinylene-Containing Polymer Acceptors with Large Dipole Moment Change for Efficient Charge Generation in High-Performance All-Polymer Solar Cells

Title: Design of Cyanovinylene-Containing Polymer Acceptors with Large Dipole Moment Change forEfficient Charge Generation in High-Performance All-Polymer Solar Cells 

 

Author: Han-Hee Cho, SeonhaKim, Taesu Kim, Vijaya Gopalan Sree, Sung-Ho Jin, Felix Sunjoo Kim, and BumjoonJ. Kim* 

 

Journal: Advanced EnergyMaterials 2017, 8 (3), 1701436 

 

Abstract: Designing polymersthat facilitate exciton dissociation and charge transport is critical for theproduction of highly efficient all-polymer solar cells (all-PSCs). Here, thedevelopment of a new class of high-performance naphthalenediimide (NDI)-basedpolymers with large dipole moment change (Δµge) anddelocalized lowest unoccupied molecular orbital (LUMO) as electron acceptorsfor all-PSCs is reported. A series of NDI-based copolymers incorporatingelectron-withdrawing cyanovinylene groups into the backbone (PNDITCVT-R) isdesigned and synthesized with 2-hexyldecyl (R = HD) and 2-octyldodecyl (R = OD)side chains. Density functional theory calculations reveal an enhancement in Δµge and delocalization of the LUMO upon the incorporation of cyanovinylenegroups. All-PSCs fabricated from these new NDI-based polymer acceptors exhibitoutstanding power conversion efficiencies (7.4%) and high fill factors (65%),which is attributed to efficient exciton dissociation, well-balanced chargetransport, and suppressed monomolecular recombination. Morphological studies bygrazing X-ray scattering and resonant soft X-ray scattering measurements showthe blend films containing polymer donor and PNDITCVT-R acceptors to exhibitfavorable face-on orientation and well-mixed morphology with small domainspacing (3040 nm). 

 

0

추천하기

0

반대하기

첨부파일 다운로드

등록자관리자

등록일2018-02-01

조회수3,269

  • 페이스북 공유
  • 트위터 공유
  • Google+ 공유
  • 인쇄하기
 
스팸방지코드 :
사진제목
Title : High molecular weight bio furan-based co-polyesters for food packaging applications: synthesis, characterization and solid-state polymerization Authors : Sungmin Hong, Kyung-Deok Min, Byeong-Uk Nam and O Ok Park* Journal : Green Chemistry, 2016, Vol.18, p.5142-5150 AbstractThe goal of this study was to develop ecofriendly bioplastics, which could be applicable in bevera...
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 det...
A Highly Sensitive Molecular Detection Platform for Robust and Facile Diagnosis of Middle East Respiratory Syndrome (MERS) Corona VirusAuthor : Il Young Jung, Jae Bem You, Bo Ram Choi, Ji Su Kim, Hyun Kyung Lee, Bora Jang, Han Saem Jeong, Kyuri Lee, Sung Gap Im*, Hyukjin Lee*Journal : Advanced Healthcare Materials 2016, 5, 2168-2173[ABSTRACT]In this work, we demonstrate a definitive ...
Size-controlled gold nano-tetradecapodswith tunable optical and electromagnetic propertiesAuthor : Kyeong Woo Choi, Shin Wook Kang, Do Youb Kim*, Sang Hyuk Im, Yangsun Park, Sang Woo Han* and O Ok Park*Journal : Journal of Materials Chemistry CPage : Vol. 4, No. 15, page 3063-3350(April, 2016)[ABSTRACT]The synthesis of novel branched Aunanocrystals with a well-defined and size-controllable dualist...
Title: Metal ion triggers for reversible switching of DNA polymeraseAuthors: Ki Soo Park, Chang Yeol Lee, and Hyun Gyu Park Journal: Chemical CommunicationsPage: Vol. 52, page 4868-4871 (April, 2016) [Abstract] We herein develop a new strategy that modulates DNA polymerase activity in a reversible and switchable manner by using the novel interactions between DNA bases and metal...