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Ternary Solar Cells Employing Thieno[3,4-b]thiophene-Based Copolymer Offer High Performance with Large Current Density and Fine-Tuned Morphology
Huang, D; Bian, FG; Zhu, DQ; Bao, XC; Hong, CX; Zhou, P; Huang, YY; Yang, CM
2019
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY C
ISSN1932-7447
Volume123Issue:24Pages:14976-14984
Subtype期刊论文
AbstractA novel thieno[3,4-b]thiophene-based donor polymer PTBTz-2 was used to construct ternary organic solar cells with two classical acceptors 3,9-bis(2-methylene-(3-(1,1-dicyano-methylene)-indanone)-5,5,11,11-tetrakis-(4-hexylphenyl)-dithieno[2,3-d:2',3'-d']-s-indaceno[1,2-b:5,6-b']dithiophene) (ITIC) and PC71BM. After the optimization of the donor-to acceptor weight ratio, a better match of the absorption spectrum and a high short circuit current density of 20.75 mA cm(-2) are obtained. The power conversion efficiency is improved to 11.26 from 10.43% after 35% PC71BM was added. The crystal structure data obtained by grazing-incidence wide-angle X-ray scattering gives a clearer picture that increase in the crystal correlation length of a donor polymer on the out-of-plane direction while decrease in the pi-pi stacking distances as the third phase of PC71BM was added. The added acceptor not only affects the structure character of the donor but also enhances the crystallization of the second acceptor ITIC on the in-plane direction. Homogeneous phase separation with a periodic distribution of donor and acceptor was observed by grazing incidence small-angle X-ray scattering as 35% PC71BM was added. Atomic force microscopy and transmission electron microscopy clearly demonstrated that a bicontinuous interpenetrating network between donors and acceptors was formatted. Our work demonstrates how to improve the photovoltaic device performance in the blend films by the added third phase from the nanomorphology and microscopic mechanism.
KeywordELECTRON-ACCEPTORS SMALL-MOLECULE POLYMER FULLERENE ENERGY EFFICIENCY MOBILITY
DOI10.1021/acs.jpcc.9b04038
Indexed BySCI
Language英语
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/32238
Collection中科院上海应用物理研究所2011-2020年
Affiliation1.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China;
2.Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai 201210, Peoples R China;
3.Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, CAS Key Lab Biobased Mat, Qingdao 266101, Shandong, Peoples R China;
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Huang, D,Bian, FG,Zhu, DQ,et al. Ternary Solar Cells Employing Thieno[3,4-b]thiophene-Based Copolymer Offer High Performance with Large Current Density and Fine-Tuned Morphology[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2019,123(24):14976-14984.
APA Huang, D.,Bian, FG.,Zhu, DQ.,Bao, XC.,Hong, CX.,...&Yang, CM.(2019).Ternary Solar Cells Employing Thieno[3,4-b]thiophene-Based Copolymer Offer High Performance with Large Current Density and Fine-Tuned Morphology.JOURNAL OF PHYSICAL CHEMISTRY C,123(24),14976-14984.
MLA Huang, D,et al."Ternary Solar Cells Employing Thieno[3,4-b]thiophene-Based Copolymer Offer High Performance with Large Current Density and Fine-Tuned Morphology".JOURNAL OF PHYSICAL CHEMISTRY C 123.24(2019):14976-14984.
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