H
Hyeyeon Kang
Researcher at University of California, Los Angeles
Publications - 5
Citations - 306
Hyeyeon Kang is an academic researcher from University of California, Los Angeles. The author has contributed to research in topics: Polymer & Crystallinity. The author has an hindex of 5, co-authored 5 publications receiving 231 citations.
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Journal ArticleDOI
The Effects of Crystallinity on Charge Transport and the Structure of Sequentially Processed F4TCNQ-Doped Conjugated Polymer Films
D. Tyler Scholes,Patrick Y. Yee,Jeffrey Lindemuth,Hyeyeon Kang,Jonathan W. Onorato,Raja Ghosh,Christine K. Luscombe,Frank C. Spano,Sarah H. Tolbert,Benjamin J. Schwartz +9 more
TL;DR: In this article, the properties of molecularly doped films of conjugated polymers are explored as the crystallinity of the polymer is systematically varied using Solution Sequential Processing (SqP) to introduce 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4TCNQ) into poly(3-hexylthiophene-2,5-diyl) (P3HT).
Journal ArticleDOI
Designing Conjugated Polymers for Molecular Doping: The Roles of Crystallinity, Swelling, and Conductivity in Sequentially-Doped Selenophene-Based Copolymers
D. Tyler Scholes,Patrick Y. Yee,George R. McKeown,Sheng Li,Hyeyeon Kang,Jeffrey Lindemuth,Xun Xia,Sophia C. King,Dwight S. Seferos,Sarah H. Tolbert,Benjamin J. Schwartz +10 more
TL;DR: Although chemical doping is widely used to tune the optical and electrical properties of semiconducting polymers, it is not clear how the degree of doping affects the electrical properties as mentioned in this paper.
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Extensive Penetration of Evaporated Electrode Metals into Fullerene Films: Intercalated Metal Nanostructures and Influence on Device Architecture
Guangye Zhang,Steven A. Hawks,Chilan Ngo,Laura T. Schelhas,D. Tyler Scholes,Hyeyeon Kang,Jordan C. Aguirre,Sarah H. Tolbert,Benjamin J. Schwartz +8 more
TL;DR: This paper shows that when commonly used electrode metals are evaporated onto films of fullerene derivatives (such as [6,6]-phenyl-C61-butyric acid methyl ester (PCBM), the metal penetrates many tens of nanometers into the fullerenes, which decreases the effective electrical thickness of fulrerene-based sandwich structure devices, and thus significantly alters the device physics.
Journal ArticleDOI
Low-Vapor-Pressure Solvent Additives Function as Polymer Swelling Agents in Bulk Heterojunction Organic Photovoltaics
Matthew T. Fontana,Hyeyeon Kang,Patrick Y. Yee,Zongwu Fan,Steven A. Hawks,Laura T. Schelhas,Selvam Subramaniyan,Ye-Jin Hwang,Samson A. Jenekhe,Sarah H. Tolbert,Benjamin J. Schwartz +10 more
TL;DR: In this paper, the authors investigate how solvent additives control polymer/fullerene mixing by taking advantage of sequential processing, in which the polymer is deposited first and then the fullerene is intercalated into the polymer underlayer in a second processing step using a quasi-orthogonal solvent.
Journal ArticleDOI
A Room-Temperature, Solution Phase Method for the Synthesis of Mesoporous Metal Chalcogenide Nanocrystal-Based Thin Films with Precisely Controlled Grain Sizes
TL;DR: In this article, the diblock copolymer template is used to lock the nanocrystals into the structure and then the template is gently dissolved out of the film, leaving behind a porous film.