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
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光电化学
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产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2019
·
IF 7.467
Yang Sun,Cheng Yang,Qicong Li,Kong Liu,Xiaodi Xue,Yang Zhang,Muhammad Azam,Kuankuan Ren,Yonghai Chen,Zhijie Wang,Shengchun Qu,Zhanguo Wang
Recent advances in ternary organic solar cells (OSCs) based on O6T-4F have revealed the attractive potential of O6T-4F in developing highly efficient devices. Even so, the exploration of photocurrent generation mechanisms in O6T-4F based devices remains critical and challenging. In this study, we systematically research on exciton separation and charge transport route in ternary OSCs based on PTB7-Th: O6T-4F: PC 71 BM by novel pump-probe photoconductive (PC) spectroscopy. Detailed studies suggest that, benefiting from the superior molecular structure, O6T-4F plays a dominant role in the photocurrent generating and charge transport. The electron injection rate from the donor to O6T-4F is fivefold larger than PC 71 BM. The separation of exciton of O6T-4F mainly occurs on the interface with the donor and that at the interface with PC 71 BM is ignorable. Moreover, for extracting electrons efficiently, a self-assemble monolayer (SAM) of 4-aminobenzoic acid (ABA) is used to modify the ZnO electron transport layer. The optimized ternary OSCs achieve a striking improvement in short-circuit current density (J sc ) and efficiency. This work provides a perspective of viewing the relationship between two acceptors in ternary system and an effective strategy to improve charge transport at the interface.
研究领域:
材料科学
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物理化学
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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
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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
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产品关联
DOI
高影响因子
HIGH PERFORMANCE POLYMERS
·
2021
·
IF 2.161
Zheng Xiao,Haitao Xu,Wenyue Liang,Binfang Wu,Yufeng Shi,Haidong Deng,Yubin Lan,Yongbing Long
A simple yet effective method based on methanol treatment is proposed to enhance the external quantum efficiency (EQE) of the photomultiplication type organic photodetector with a structure of Glass/ITO/PEDOT:PSS/P3H:PC71BM (100:1, wt./wt.)/Al. By modifying the PEDOT:PSS film surface with methanol, the EQE of photodetector significantly improved within a broad wavelength range of 300–700 nm. The maximum EQE of 25300% occurs at the wavelength of 350 nm in the methanol-treated device under −9 V bias, which more than doubles that (11500%) of the device without treatment. In addition, as a result of the methanol treatment, the detectivity of the device improved from 3.72 × 1012 to 7.24 × 1012 Jones at −9 V under 350 nm light illumination. The large improvement is attributed to the fact that the methanol treatment can improve the electrical performance of the PEDOT:PSS by removing the insulator PSS within the film and also result in PC71BM aggregations in the active layer. The latter can enhance the tunneling hole injection by the intensified energy-level bending, which is induced by both the trapped electrons in these aggregations and accumulated ones near Al electrode. As a result, the modification of both the PEDOT:PSS layer and the active layer increases the response current, resulting in the EQE improvement.
研究领域:
材料科学
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光学工程
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产品关联
DOI
高影响因子
Polymers
·
2018
·Vol. 10
·期 3
·332
·
IF 2.935
Dayong Zhang,Rong Hu,Jiang Cheng,Yuqiang Chang,Mingming Huo,Junsheng Yu,Lu Li,Jian-Ping Zhang
The morphology of active layer for polymer solar cells is critical to enhance the performance especially for fill factor of the devices. To investigate the relationship between active layer morphology and performance of polymer solar cells (PSCs), 1,8-diiodooctane (DIO) additive, and [6,6]-phenyl-C71-butyric acid methyl ester (PC71BM) electron acceptor were used to regulate the aggregation morphology of copolymer poly(thieno[3,4-b]-thiophene/benzodithiophene) (PTB7) electron donor from solution state to solid state. Atom force microscopy (AFM), steady-state absorption (UV-Vis), time-resolved absorption (TA), spectroelectrochemistry (SEC) and current-voltage (J-V) measurements were employed to characterize the morphology, optical and electrical characteristics of active layers and to reveal the relationship among the morphology, photophysical property, and performance of PTB7-based devices. The results show that DIO can refine the aggregation scale of PTB7 during the dissolution process, whereas both the aggregation scale and aggregation behaviors of PTB7 donor are affected by PC71BM acceptor molecules. Furthermore, the bulk heterojunction structure (BHJ) morphology of active layer can be optimized during the DIO evaporation process. TA kinetic data indicate that the population and lifetime of charged species are improved in the DIO-treated BHJ active layer. Moreover, the active layers with DIO treatment have a relative low highest occupied molecular orbital (HOMO) energy level, which makes hole transport more easily in PTB7 donor phase. As a result, the performance of PTB7-based PSCs is enhanced.Keywords:polymer solar cells;PC71BM acceptor;PTB7 donor;DIO additive;charge generation and transport;phase separation structure
研究领域:
材料科学
·
物理化学
✓ 已验证
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
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Photonics
·
2026
·
IF 6
Qingshui Zheng,Zeyuan Zhao,Zhihang Jin,Yu Zou,Anling Tong,Pengxu Chen,Ruowei He,Yang Wang,Weihai Sun,Chaoping Fu,Jihuai Wu,Sheng Yang
The migration of iodide ions and the inefficient interfacial charge transport continue to pose significant challenges to power conversion efficiency (PCE) and stability of perovskite solar cells (PSCs). In this study, we innovatively introduce a multifunctional passivation method that involves doping the P-type material 2,3,5,6-Tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4TCNQ) into the fullerene derivative (6,6)-Phenyl C71-butyric acid methyl ester (PC71BM). The introduction of F4TCNQ not only enhances the ability of PC71BM to passivate uncoordinated Pb2+ ions but also promotes a uniform distribution of the passivation layer. Results indicate that this passivation layer effectively immobilizes iodide ions, preventing their random movement within the PVK films and reducing iodine-related defects. Additionally, by raising the Fermi level and enhancing the P-type characteristics, it improves hole extraction and transport, thereby reducing nonradiative recombination in the target device. Consequently, the n-i-p PSCs with the mixed passivation layer achieved a champion PCE of 25.87%, with a higher open-circuit voltage (1.182 V) and a remarkable fill factor (84.64%). Notably, in large-scale manufacturing, n-i-p mini-modules reached a commendable PCE of 22.34%. Furthermore, these devices demonstrated superior stability, maintaining over 95% of their initial efficiency after 900 h of maximum power point (MPP) tracking under ISOS-L-1 standards.
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产品关联
DOI
高影响因子
Science of Advanced Materials
·
2015
·Vol. 7
·期 5
·985-992
·
IF 2.598
Sun Yue,Liu Jiangang,Wang Haiyang,Yu Xinhong,Xing Rubo,Han Yanchun
Bicontinuous phase structure in Poly(3,3 -didodecylquaterthiophene) (PQT-12)/[6,6]-phenyl-C71-butyric acid methyl ester (PC71BM) blend films was formed by using thiophene as solvent to suppress the compatibility between PC71BM and side chains of PQT-12. The interaction
between PQT-12 chains was enhanced and the interaction between PC71BM and PQT-12 was weakened in thiophene because of the good compatibility of thiophene with PQT-12 and its planar molecular structure. Thus, the energy barrier for PC71BM nucleation was overcome. As a
result, spherical PC71BM domains surrounded by the continuous phase of PQT-12 were formed after spin-coating. This structure was not stable and secondary phase separation was induced by thermal annealing. During thermal annealing, adjacent spherical PC71BM domains grew
and connected together, which cut off PQT-12 continuous phase. Subsequently, the PQT-12 phase grew further and connected again. At last, bicontinuous structure was formed. The power conversion efficiency of the device prepared from solution in thiophene was almost 1.9 times of the one from
chloroform.
研究领域:
材料科学
·
有机电子学
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聚合物物理
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光伏技术
✓ 已验证
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
危险品化学品经营许可证（带存储）