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

Recent Achievements


[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). 






첨부파일 다운로드




  • 페이스북 공유
  • 트위터 공유
  • Google+ 공유
  • 인쇄하기
스팸방지코드 :
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...
Tuning selectivity of electrochemical reactions by atoomically dispersed platinum catalyst Chang Hyuck Choi, Minho Kim, Han Chang Kwon, Sung June Cho, Seongho Yun, Hee-Tak Kim, Karl J.J. Mayrhofer, Hyungjun Kim, Minkee Choi Nature Communications, Vol. 7, page 10922 (March 8, 2016) [Abstract] Maximum atom efficiency as well as distinct chemoselectivity is expected for electrocat...