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: A hydrocarbon/Nafion bilayer membrane with a mechanical nano-fastener for vanadium redox flow batteries   Author: Soohyun Kim, Seongmin Yuk, Hyungyu Kim, Chanyong Choi, Riyul Kim, Jang Young Lee, Young Taik Hong and Hee-Tak Kim* Journal: Journal of Materials Chemistry A, 2017, 5, 17279-17286 Inside front cover Abstra...
Title: Stimuli-Responsive, Shape-Transforming Nanostructured Particles Author: Junhyuk Lee, Kang Hee Ku, Mingoo Kim, Jae Man Shin, Junghun Han, Chan Ho Park, Gi-Ra Yi, Se Gyu Jang, Bumjoon J. Kim*   Journal: Advanced Materials, 2017, Vol.29, 1700608 Abstract Dynamic, temperature-driven transformation of the shap...
Title:  [Frontispiece] Structural Color Palettes of Core-Shell Photonic InkCapsules containing Cholesteric Liquid CrystalsAuthor: Sang Seok Lee, HyeonJin Seo, Yun Ho Kim,* and Shin-Hyun Kim*Journal: AdvancedMaterials, 2017, Vol.29, 1606894AbstractPhotonicmicrocapsules with onion-like topology are microfluidically designed to have cholesteric liquid crystals with oppositehandedness in th...
Title:  [Front cover] Selective Coloration of Melanin Nanospheres throughResonant Mie ScatteringAuthor: Soojeong Cho, Tae SoupShim, Ju Hyeon Kim, Dong-Hyun Kim, and Shin-Hyun Kim*Journal: Advanced Materials,2017, Vol.29, 1700256AbstractBlack melanin inks are preparedto selectively exhibit colors under strong light, inspired by human hair. Highabsorbance of melanin suppresses multiple sca...
Title:  [Inside Front Cover] An Ultrasensitive, Visco-Poroelastic Artificial Mechanotransducer Skin Inspired by Piezo2 Protein in Mammalian Merkel Cells  Author: Ming Liang Jin†, Sangsik Park†, Younghoon Lee, Ji Hye Lee, Junho Chung, Joo Sung Kim, Jong-Seon Kim, So Young Kim, Eunsong Jee, Dae Woo Kim, Jae Woo Chung,Seung Geol Lee, Dukhyun Choi, Hee-Tae Jung* ...