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

Recent Achievements


[cover picture] Self-Organization of Polymer Additive, Poly(2-vinylpyridine) via One-Step Solution Processing to Enhance the Efficiency and Stability of Polymer Solar Cells

Title: Self-Organization of Polymer Additive, Poly(2-vinylpyridine) via One-Step Solution Processing to Enhance the Efficiency and Stability of Polymer Solar Cells

Author: Wonho Lee, Seonju Jeong, Changyeon Lee, Gibok Han, Changsoon Cho, Jung-Yong Lee, Bumjoon J. Kim* 


Journal: Advanced Energy Materials, 2017, Vol.7, 1602812


 Interfaces between the photoactive layers and electrodes play critical roles in controlling the performance of optoelectronic devices. Herein, a novel nonconjugated polymer additive (nPA), poly(2-vinylpyridine) (P2VP), is reported for modifying the interfaces between the bulk-heterojunction (BHJ) and cathode/metal oxide (MO) layers. The P2VP nPA enables remarkably enhanced power conversion efficiencies (PCEs) and ambient stability in different types of polymer solar cells (PSCs). Importantly, interfacial engineering can be achieved during deposition of the P2VP nPA-containing BHJ active layer via simple, one-step solution processing. The P2VP nPA has much higher surface energy than the BHJ active components and stronger interaction with the surface of MO, which affords spontaneous vertical phase separation from the BHJ layer on the MO surface by one-step solution processing. The self-assembled P2VP layer substantially reduces the work function and surface defect density of MO, thereby minimizing the charge-extraction barrier and increasing the PCEs of the PSCs significantly, i.e., PTB7-Th:PC71BM (10.53%11.14%), PTB7:PC71BM (7.37%8.67%), and PTB7-Th:P(NDI2HD-T) all-PSCs (5.52%6.14%). In addition, the lifetimes of the PSCs are greatly improved by the use of the P2VP nPA. 







첨부파일 다운로드




  • 페이스북 공유
  • 트위터 공유
  • Google+ 공유
  • 인쇄하기
스팸방지코드 :
Liquid-Impermeable Inverse Opals with Invariant Photonic Bandgap (pages 1282–1287) Hyelim Kang, Joon-Seok Lee, Won Seok Chang and Shin-Hyun Kim Article first published online: 10 DEC 2014 | DOI: 10.1002/adma.201404706 [ABSTRACT] Omniphobic inverse opals are created by structurally and chemically modifying the surface of inverse opals through reactive ion etching. During the etching, ...
Robust Microfluidic Encapsulation of Cholesteric Liquid Crystals toward Photonic Ink Capsules,` Advanced Materials, 27, 627−633 (2015) Sang Seok Lee, Bomi Kim, Su Kyung Kim, Jong Chan Won, Yun Ho Kim, and Shin-Hyun Kim 관련기사:  [ABSTACT] Robust photonic microcapsules are created by microfluidic encapsulation of chol...
Cofactor-Free Light-Driven Whole-Cell Cytochrome P450 Catalysis Angew. Chem. Int. Ed. 54(3):969-973 (Jan. 12 2015)   Park JH, Lee SH, Cha GS, Choi DS, Nam DH, Lee JH, Lee JK, Yun CH, Jeong KJ*, Park, CB*  [ABSTRACT] Cytochromes P450 can catalyze various regioselective and stereospecific oxidation reactions of non-functionalized hydrocarbons. Here, we have designed a novel ...
Metabolic engineering of antibiotic factories: new tools for antibiotic production in actinomycetes Tilmann Weber, Pep Charusanti, Ewa Maria Musiol-Kroll, Xinglin Jiang, Yaojun Tong, Hyun Uk Kim, Sang Yup Lee  [ABSTRACT] Actinomycetes contain diverse antibiotic gene clusters that have not been fully explored yet. Existing and recently developed tools now allow us to perform metabolic ...
New Platform for cytochrome P450 reaction combining in situ immobilization on biopolymer.   Lee JH, Nam DH, Lee SH, Park JH, Park SJ, Lee SH, Park CB, Jeong KJ   Bioconjugate Chemistry (2014) 25(12):2101-2104.   [ABSTRACT]We describe an efficienct chemical conversion platform with in situ immobilization of P450-BM3 on poly(3-hydroxybutyrate) granules. Through fusion ...