Imperial College London

DrHyojungCha

Faculty of Natural SciencesDepartment of Chemistry

Research Associate
 
 
 
//

Contact

 

h.cha

 
 
//

Location

 

G22Molecular Sciences Research HubWhite City Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Hong:2019:10.1002/chem.201804803,
author = {Hong, J and Wang, C and Cha, H and Kim, HN and Kim, Y and Park, CE and An, TK and Kwon, S-K and Kim, Y-H},
doi = {10.1002/chem.201804803},
journal = {Chemistry},
pages = {649--656},
title = {Morphology Driven by Molecular Structure of Thiazole-Based Polymers for Use in Field-Effect Transistors and Solar Cells.},
url = {http://dx.doi.org/10.1002/chem.201804803},
volume = {25},
year = {2019}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - The effects of the molecular structure of thiazole-based polymers on the active layer morphologies and performances of electronic and photovoltaic devices were studied. Thus, thiazole-based conjugated polymers with a novel thiazole-vinylene-thiazole (TzVTz) structure were designed and synthesized. The TzVTz structure was introduced to extend the π conjugation and coplanarity of the polymer chains. By combining alkylthienyl-substituted benzo[1,2-b:4,5-b']dithiophene (BDT) or dithieno[2,3-d:2',3'-d']benzo[1,2-b:4,5-b']dithiophene (DTBDT) electron-donating units and a TzVTz electron-accepting unit, enhanced intermolecular interactions and charge transport were obtained in the novel polymers BDT-TzVTz and DTBDT-TzVTz. With a view to using the polymers in transistor and photovoltaic applications, the molecular self-assembly in and their nanoscale morphologies of the active layers were controlled by thermal annealing to enhance the molecular packing and by introducing a diphenyl ether solvent additive to improve the miscibility between polymer donors and [6,6]phenyl-C71-butyric acid methyl ester (PC71 BM) acceptors, respectively. The morphological characterization of the photoactive layers showed that a higher degree of π-electron delocalization and more favorable molecular packing in DTBDT-TzVTz compared with in BDT-TzVTz leads to distinctly higher performances in transistor and photovoltaic devices. The superior performance of a photovoltaic device incorporating DTBDT-TzVTz was achieved through the superior miscibility of DTBDT-TzVTz with PC71 BM and the improved crystallinity of DTBDT-TzVTz in the nanofibrillar structure.
AU - Hong,J
AU - Wang,C
AU - Cha,H
AU - Kim,HN
AU - Kim,Y
AU - Park,CE
AU - An,TK
AU - Kwon,S-K
AU - Kim,Y-H
DO - 10.1002/chem.201804803
EP - 656
PY - 2019///
SP - 649
TI - Morphology Driven by Molecular Structure of Thiazole-Based Polymers for Use in Field-Effect Transistors and Solar Cells.
T2 - Chemistry
UR - http://dx.doi.org/10.1002/chem.201804803
UR - https://www.ncbi.nlm.nih.gov/pubmed/30395365
VL - 25
ER -