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 :
Title: SERS‐Active‐Charged Microgels for Size‐ and Charge‐Selective Molecular Analysis of Complex Biological Samples Author: Dong Jae Kim, Sung‐Gyu Park, Dong‐Ho Kim,* and Shin‐Hyun Kim* Journal: Small, 2018, 14, 1802520 Abstract: Surface‐enhanced Raman scattering (SERS) provides a dramatic increase of Raman intensity for molecules adsorbed on nanogap‐rich meta...
Title: Aspect Ratio-ControlledSynthesis of Uniform Colloidal Block Copolymer Ellipsoids from Evaporative Emulsions Author: Jae Man Shin, YongJoo Kim, KangHee Ku, Young Jun Lee, Eun Ji Kim, Gi-Ra Yi*, and Bumjoon J. Kim* Journal: Chemistry of Materials, 30, 18, 6277-6288, Inside front cover Abstract: Block copolymers (BCPs)confined in evaporative emulsions can ass...
Title: Fully Dispersed Rh Ensemble Catalyst To Enhance Low-Temperature Activity   Author: Hojin Jeong, Geonhee Lee, Beom-Sik Kim, Junemin Bae, Jeong Woo Han, and Hyunjoo Lee*   Journal: Journal of American Chemical Society, 2018, 140, 9558-9565   Abstract: Minimizing the use of precious metal catalysts is important in many applicati...
Title: Domain Structures of Poly(3-dodecylthiophene)-Based Block Copolymers Depend onRegioregularity Author: Jin-Seong Kim, Junghun Han, Youngkwon Kim, Hyeonjung Park,Jonathan P. Coote Gila E Stein*, and Bumjoon J. Kim* Journal: Macromolecules 51, 11, 4077-4084, Outside frontcover Abstract: Microphase-separation behavior of conjugated–amorphous block copol...
Title: An Ultrastable Ionic Chemiresistor Skin with an Intrinsically Stretchable Polymer ElectrolyteAuthor: Ming Liang Jin, Sangsik Park, Jong-Seon Kim, Sung Hyun Kwon, Shuye Zhang, Min Seok Yoo, Sungwoo Jang, Hyeong-Jun Koh, Soo-Yeon Cho, So Young Kim, Chi Won Ahn, Kilwon Cho, Seung Geol Lee, Do Hwan Kim,* and Hee-Tae Jung*Journal: Advanced Materials, 2018, Vol.30, 1706851Abstract: Ultrastable se...