Chem. J. Chinese Universities ›› 2023, Vol. 44 ›› Issue (7): 20230068.doi: 10.7503/cjcu20230068
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ZHANG Yongqian1,2, ZHU Xiaoyu1,2, MIAO Junhui1, LIU Jun1,2(), WANG Lixiang1,2
Received:
2023-02-15
Online:
2023-07-10
Published:
2023-03-24
Contact:
LIU Jun
E-mail:liujun@ciac.ac.cn
Supported by:
CLC Number:
TrendMD:
ZHANG Yongqian, ZHU Xiaoyu, MIAO Junhui, LIU Jun, WANG Lixiang. Effect of Alkyl-chain Branching Position on Molecular Aggregation of All-fused-ring Molecules[J]. Chem. J. Chinese Universities, 2023, 44(7): 20230068.
Material | λ | λ | 10-4εmaxa /(L∙mol–1∙cm–1) | E | ELUMOb /eV | EHOMOc /eV |
---|---|---|---|---|---|---|
FM5 | 763 | 844 | 8.7 | 1.35 | -3.96 | -5.65 |
FM6 | 763 | 809 | 8.0 | 1.40 | -4.01 | -5.70 |
Table 1 Optical and electrochemical parameters of FM5 and FM6
Material | λ | λ | 10-4εmaxa /(L∙mol–1∙cm–1) | E | ELUMOb /eV | EHOMOc /eV |
---|---|---|---|---|---|---|
FM5 | 763 | 844 | 8.7 | 1.35 | -3.96 | -5.65 |
FM6 | 763 | 809 | 8.0 | 1.40 | -4.01 | -5.70 |
Fig.3 2D⁃GIWAXS patterns of the pristine films for FM5(A) and FM6(B) and the 1D GIWAXS line curves of the corresponding pristine films with respect to the out⁃of⁃plane and in⁃plane directions(C)
Fig.4 An inverted device architecture investigated in this work(A), chemical structures of D18(B), energy level alignment for D18, FM5 and FM6(C), J⁃V characteristics of the relevant devices(D) and EQE spectra for the relevant devices based on different materials(E)
Active layer | VOC/V | JSC(Jcal)*/(mA∙cm-2) | FF(%) | PCE(%) | Jph,SC/Jph,sat(%) |
---|---|---|---|---|---|
D18∶FM5 | 0.73 | 20.22(18.92) | 61.2 | 9.03 | 95.6 |
D18∶FM6 | 0.78 | 14.99(13.77) | 57.1 | 6.67 | 88.8 |
Table 2 Photovoltaic parameters of the devices under AM 1.5G illumination(100 mW/cm2)
Active layer | VOC/V | JSC(Jcal)*/(mA∙cm-2) | FF(%) | PCE(%) | Jph,SC/Jph,sat(%) |
---|---|---|---|---|---|
D18∶FM5 | 0.73 | 20.22(18.92) | 61.2 | 9.03 | 95.6 |
D18∶FM6 | 0.78 | 14.99(13.77) | 57.1 | 6.67 | 88.8 |
Fig.5 2D⁃GIWAXS patterns of D18∶FM5(A) and D18∶FM6(B) blend films and the 1D GIWAXS line curves of the D18∶FM5(a, b) and D18∶FM6(c, d) blend films in out⁃of⁃plane(a, c) and in⁃plane(b, d) directions(C)
Fig.7 Dependences of JSC(A) and VOC(B) on light intensity for the devices based on D18∶FM5(a) and D18∶FM6(b) and JphversusVeff for the devices based on D18∶FM5(a) and D18∶FM6(b)(C)
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