JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2022
·Vol. 33
·期 36
·27158-27168
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IF 2.779
Guo Hao,Hao Changshi,Dai Chunai,An Xiaoyan,Yan Luting
Suitable modification to the ZnO cathode interface of polymer solar cells can effectively enhance the efficiency, stability, and electron extraction capability of the device. With the use of vacant Keggin type PW polyoxometalates (POMs), polymer solar cells with ZnO:POM composite electron transport layer (ETL) were prepared. Compared with the single ZnO ETL, the addition of POMs mainly improved the interface contact and reduced the charge transfer barrier, which was conducive to exciton dissociation and charge collection. When the doping concentration of POMs was 0.1 mg/mL, the power conversion efficiency of the device with the structure of ITO/ZnO-PW11-0.1/PTB7: PC 71 BM/MoO 3 /Al could reach 8.66%, which was 18.5% higher than that of the control device (7.31%).
研究领域:
材料科学
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能源科学
·
光电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2018
·
IF 4.484
Cheng-Kun Lv,Fei Zheng,Xiao-Yu Yang,Peng-Qing Bi,Meng-Si Niu,Yu-Zhu Wang,Trevor A. Smith,Kenneth P. Ghiggino,Xiao-Tao Hao
A facile method is proposed to obtain modified shorn graphene oxide (DDAB-sGO) with improved dispersion in organic solvents. Didodecyl dimethylammonium bromide (DDAB)-sGO, which exhibits good dispersibility in the nonpolar solvent o-dichlorobenzene, was obtained via the sono-Fenton reaction and DDAB ionic functionalization. DDAB-sGO was used in the preparation of conjugated polymer:fullerene blend composites. UV–visible absorption spectra, steady-state photoluminescence spectra, fluorescence decay, and grazing incidence X-ray scattering measurements were applied to characterize morphologies, structural features, and charge-transport characteristics of the composites. Doped into poly[[4,8-bis[(2-ethylhexyl)oxy]benzo[1,2-b:4,5-b′]dithiophene-2,6-diyl][3-fluoro-2-[(2-ethylhexyl)carbonyl]thieno[3,4-b]thiophenediyl]] (PTB7):[6,6]-phenyl C71 butyric acid methyl ester (PC71BM) conjugated polymer blends, DDAB-sGO is shown to facilitate increased crystallinity and phase separation of PTB7 and PC71BM to achieve a more optimal morphology for bulk heterojunction solar cells, resulting in a ∼12% enhancement in power conversion efficiency over the undoped PTB7:PC71BM blend.
研究领域:
材料科学
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纳米技术
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太阳能
·
有机电子学
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2022
·
IF 5.546
Xinxiu Cao,Liang Xie,Xinyu Zhu,Jiayu Lv,Hui Fan
Processing solvent additives is an effective approach to improve the performance of polymer solar cells (PSCs). However, traditional additives, such as 1-chloronaphthalene (CN) and 1,8-diiodooctane (DIO), are halogenated solvent, which is not environmentally friendly. Here, we investigated the device performance of PTB7:PC 71 BM blend films processed with three aromatic ethers, CN and DIO. The results indicate that aromatic ethers have a higher device performance improvement than halogenated solvents. Using green solvent 1,2-dimethoxybenzene as the processing additive, the efficiency of PSCs was improved from 2.83% to 6.18%. We proposed two criteria to choose green solvent additives: (i) good solvent for PC 71 BM and nonsolvent for PTB7, (ii) higher boiling point than the host solvent, but not too high (about 70 ℃ higher is enough). The X-ray diffraction results indicated that PTB7 does not crystallize in the blend films, and thus the formation of phase separation morphology is primarily through liquid–liquid (L-L) phase separation. The structure analyses of the blend films demonstrated that solvent additives with poor solubility to PTB7 are beneficial in eliminating PC 71 BM sea-island domains and in promoting the formation of bi-continuous phase separation morphology, while nonsolvent additives with relatively lower boiling point could prevent PC 71 BM from moving to the bottom layer of the blend films during the drying process and thus the resulting films have a better vertical phase separation structure. The selection principles of green solvent additives proposed in this study can be further used to optimize the active layer structure of other PSCs occurred upon L-L phase separation.
研究领域:
材料科学
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可再生能源
·
化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 9
·6698-6705
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IF 2.22
Xu Mingyuan,Yan Luting,Zhu Yanyun,Li Yuting,Song Xiaodong,Yin Lan
Polydopamine (PDA)-coated gold nanoparticles (Au@PDA) were used as electronic transport layer (ETL) modifiers in PTB7:PC71BM polymer solar cells. PDA can effectively modify the surface of gold nanoparticles (Au NPs) and improve the stability of them. In addition, PDA also effectively binds to ZnO ETL, reducing surface defect and improving the combination between the interface layer and the active layer. In this study, AuNPs with particle size of about 30 nm was prepared by Frens reduction method, and then the dopamine (DA) self-polymerized on the surface of them to obtain a core–shell structural material Au@PDA. By regulating the polymerization time of DA, different PDA shell thickness was obtained. The Au@PDA was introduced into ZnO ETL to generate local plasmon resonance adsorption. When dopamine polymerized for an hour, the short current density of the modified solar cells reached 13.98 mA/cm 2 , and the power conversion efficiency reached 6.03%, which was 130% of the device without Au@PDA.
研究领域:
材料科学
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能源科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 29
·期 23
·19976-19984
·
IF 2.324
Gao Xiuyuan,Yan Luting,Xu Runxiang,Sun Xiaotong
The local surface plasmon resonance effect of Au nanorods (AuNRs) can help improve the performance of polymer solar cells (PSCs). Polydopamine (PDA), as a new electron transfer layer (ETL) modifier, has also attracted attention. Electron beam irradiation can further control the molecular structure and morphology of PDA and optimize its binding with ZnO. In this study, AuNRs with different aspect ratios (ARs) were prepared by the seed growth method. Then, the AuNRs with different ARs were selected to modify the ZnO ETL of PSCs based on the inverted structure of PTB7:PC 71 BM. The short current density ( J sc) of the long AuNR-modified solar cell (AR = 4.18) reached 10.81 mA/cm 2 , and the PCE reached 4.57%. The PDA/AuNR composite films before and after electron beam irradiation were further used to modify the ZnO ETL. The J sc and PCE of the PDA/AuNR composite-modified device increased to 11.97 mA/cm 2 and 4.75%, respectively. The PCE of the device with 50 kGy-irradiated PDA/AuNR composite modifier reached 5.66%, which was 1.59 times of the device without PDA/AuNRs.
研究领域:
材料科学
·
能源科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
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