Solar RRL
·
2018
·Vol. 2
·期 12
·1800230
·
IF 0
Zhongze Liu,Kaimo Deng,Yayun Zhu,Meng Wang,Liang Li
The quality of the perovskite film has a vital influence on the performance of perovskite solar cells and it is quite desirable to simultaneously manipulate the crystallization and morphology of the perovskite film. In this study, conventional PbI 2 is replaced with a PbI 2 /I 2 mixed precursor during the first step of sequential deposition, causing the formation of a PbI 2 porous nanostructure. By changing the content of I 2 in the precursor, the morphology of the PbI 2 film as well as the resulting perovskite film can be successfully modulated. With an optimal content of I 2 , a high-quality perovskite film with a pure phase and smooth surface can be achieved. As a result, the conversion efficiency of perovskite solar cells using a PbI 2 /I 2 mixed precursor can be as high as 18.63%, compared to 16.89% for the reference device through traditional sequential deposition with a pure PbI 2 precursor.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
JOURNAL OF PHYSICS D-APPLIED PHYSICS
·
2025
·Vol. 58
·期 23
·235101
·
IF 3.2
Longhui Lei,Wenbo Cao,Jiajin Kuang,Chaofan Zheng,Mingtai Wang
A systematic investigation is conducted to determine the role of thiourea in regulating crystallization and defect formation in solution-processed CuInS2 solar cells. By modulating the Cu:In:S stoichiometry (1:1:6–1:1:10), sulfur content is found to critically influence material properties. The optimal stoichiometry (1:1:8) balances the defects density, stabilizes the chalcopyrite phase, and suppresses deleterious secondary phases, yielding a peak efficiency of 5.16% (Voc = 0.68 V, Jsc = 11.91 mA cm−2, FF = 63.52%). Excessive thiourea (1:1:10) induces defects (InCu) and (Ini), degrading device performance. These findings establish a dual mechanism for thiourea's role in solar cell performance: regulating defects concentration and crystal phase composition, providing a theoretical guide for solution-processed CuInS2 devices.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 16
·5498-5504
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IF 6.4
Haoyu Xu,Xuanyang Guo,Hui Yang,Qing Zhou,Shiyan Liu,Haifeng Gao,Chao Gao,Wei Yu
In this study, Cu2ZnSn(S,Se)4 (CZTSSe) films were prepared by a non-vacuum solution method. The efficiency of an as-fabricated CZTSSe solar cell was improved from 8.0% to 10.9% by adding NaTFSI (sodium bis(trifluoromethanesulfonyl)imide) in the precursor solution. It was found that the NaTFSI additive could facilitate the formation and grain-growth of CZTSSe during the selenization of the film. As a result, the size of the crystalline grains in the CZTSSe films increased. Besides, a shallow level acceptor rather than a deep level acceptor could be generated in the CZTSSe films by using the NaTFSI additive. The use of NaTFSI could also decrease the relative content of the low valence Sn2+, which was believed to be related with deep level defects in CZTSSe. In addition, the effect of the NaTFSI concentration on the properties of CZTSSe solar cells were investigated. We found that excess NaTFSI in the precursor solution would not influence the recombination of the carriers in the neutral region of the solar cell, but could enhance the recombination of the carriers in the depletion region of the solar cell. Therefore, the performances of CZTSSe solar cells were reduced when excess NaTFSI was added in the precursor solution.
研究领域:
材料科学
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能源科学
✓ 已验证
DOI
高影响因子
AIP Advances
·
2021
·Vol. 11
·期 7
·
IF 1.548
Lv Xiaogong,Zhu Chengjun,Yang Yanchun,Liu Ruijian,Fan Wenliang,Wang Yiming
In this work, Cu 2 ZnSnS 4 (CZTS) precursor films were deposited using a water-based solution approach. Subsequently, selenization was performed at different temperatures in the range of 480–610 °C to prepare Cu 2 ZnSn(S,Se) 4 (CZTSSe) absorber-layer films. The effects of the selenization temperature on the crystallinity, structure, morphology, and photoelectric properties of CZTSSe thin films, as well as the performance of solar cells constructed using these films, were systematically studied. The absorber-layer films selenized at different temperatures all formed pure-phase CZTSSe and had basically the same film thickness. It was found that application of an optimal selenization temperature can enhance the crystallinity, crystal grain size, and mobility and reduce the resistivity of CZTSSe films. Selenization at 550 °C resulted in the largest grain size (∼ μ m), the highest crystallinity, the highest mobility (4.29 cm 2 V −1 s −1 ), the lowest resistivity (3.13 × 10 2 Ω cm), the thinner fine-grained layer, a bandgap value of 1.21 eV, and a Cu-poor, Zn-rich elemental composition [Cu/(Zn + Sn) = 0.85 and Zn/Sn = 1.16]. The power-conversion efficiency was improved from 3.04% in a CZTSSe cell device with an absorber layer selenized at 480 °C to 4.69% in a film selenized at 550 °C. This was mainly due to the improvement of the crystallinity, crystal grain growth, and reduction of the fine-grained layer of the CZTSSe film. These results show that optimizing the selenization temperature is essential for enhancing the performance and the ultimate device efficiency of CZTSSe absorber layers prepared using a water-based solution approach.
研究领域:
材料科学
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能源技术
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Yanfang Tao,Yanyan Li,Meng He,Xiandong Zhao,Xiaojie Yang,Jinmao Li,Li Zhao,Yang Li,Shimin Wang
Sb 2 S 3 thin-film materials are regarded as promising candidates for next-generation thin-film solar cells due to their superior stability, simple chemical composition, cost-effectiveness, and excellent charge transport properties. In numerous studies, Sb 2 S 3 solar cells prepared with cadmium sulfide as the electron transport layer demonstrated high photovoltaic conversion efficiencies, mainly due to the key role of the CdS layer in optimizing the crystalline quality of Sb 2 S 3 thin films, regulating the crystal growth orientation, and enhancing the charge transport properties. Therefore, cadmium sulfide play a crucial role in determining the crystallinity, growth orientation, and charge transport performance of antimony sulfide films. Currently, the commonly used cadmium sources regarding the CdS preparation process are Cd(NO 3 ) 2 , CdSO 4 , CdCl 2 , and Cd(Ac) 2 . This study systematically investigates the effects of different Cd sources on the crystallization, morphology and charge transport properties of Sb 2 S 3 thin films. The results demonstrate that CdS prepared from Cd(NO 3 ) 2 significantly enhanced the crystallinity, grain morphology, band gap energy level, and photovoltaic performance of Sb 2 S 3 thin films, reaching a photovoltaic conversion efficiency of 4.23 %, which provides a solid foundation for further optimization and improvement of Sb 2 S 3 solar cells.
研究领域:
薄膜太阳能电池
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材料科学
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光伏技术
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半导体材料
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 14
·2213941
·
IF 19
Yandi Luo,Guojie Chen,Shuo Chen,Nafees Ahmad,Muhammad Azam,Zhuanghao Zheng,Zhenghua Su,Michel Cathelinaud,Hongli Ma,Zhigang Chen,Ping Fan,Xianghua Zhang,Guangxing Liang
Exhibiting outstanding optoelectronic properties, antimony selenide (Sb 2 Se 3 ) has attracted considerable interest and has been developed as a light absorber layer for thin-film solar cells over the decade. However, current state-of-the-art Sb 2 Se 3 devices suffer from unsatisfactory “cliff-like” band alignment and severe interface recombination loss, which deteriorates device performance. In this study, the heterojunction interface of an Sb 2 Se 3 solar cell is improved by introducing effective aluminum (Al 3+ ) cation into the CdS buffer layer. Then, the energy band alignment of Sb 2 Se 3 /CdS:Al heterojunction is modified from a “cliff-like” structure to a “spike-like” structure. Finally, heterojunction interface engineering suppresses recombination losses and strengthens carrier transport, resulting in a high efficiency of 8.41% for the substrate-structured Sb 2 Se 3 solar cell. This study proposes a facile strategy for interfacial treatment and elucidates the related carrier transport enhancement mechanism, paving a bright avenue to overcome the efficiency bottleneck of Sb 2 Se 3 thin-film solar cells.
研究领域:
材料科学
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光电子学
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可再生能源
✓ 已验证
DOI
高影响因子
Journal of the American Chemical Society
·
2020
·
IF 14.612
Keqiang Chen,Wei Jin,Yupeng Zhang,Tingqiang Yang,Peter Reiss,Qiaohui Zhong,Udo Bach,Qitao Li,Yingwei Wang,Han Zhang,Qiaoliang Bao,Yueli Liu
All-inorganic α-CsPbI3 perovskite quantum dots (QDs) are attracting great interest as solar cell absorbers due to their appealing light harvesting properties and enhanced stability due to the absence of volatile organic constituents. Moreover, ex situ synthesized QDs significantly reduce the variability of the perovskite layer deposition process. However, the incorporation of α-CsPbI3 QDs into mesoporous TiO2 (m-TiO2) is highly challenging, but these constitute the best performing electron transport materials in state-of-the-art perovskite solar cells. Herein, the m-TiO2 surface is engineered using an electron-rich cesium-ion containing methyl acetate solution. As one effect of this treatment, the solid–liquid interfacial tension at the TiO2 surface is reduced and the wettability is improved, facilitating the migration of the QDs into m-TiO2. As a second effect, Cs+ ions passivate the QD surface and promote the charge transfer at the m-TiO2/QD interface, leading to an enhancement of the electron injection rate by a factor of 3. In combination with an ethanol-environment smoothing route that significantly reduces the surface roughness of the m-TiO2/QD layer, optimized devices exhibit highly reproducible power conversion efficiencies exceeding 13%. The best cell with an efficiency of 14.32% (reverse scan) reaches a short-circuit current density of 17.77 mA cm–2, which is an outstanding value for QD-based perovskite solar cells.
研究领域:
材料科学
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能源技术
✓ 已验证
DOI
PubMed
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2017
·Vol. 19
·期 8
·6057-6063
·
IF 4.123
Xiang Fang,Jianning Ding,Ningyi Yuan,Peng Sun,Minghang Lv,Guqiao Ding,Chong Zhu
Organic–inorganic halide perovskites have emerged as attractive materials for use in photovoltaic cells. Owing to the existence of dangling bonds at the grain boundaries between perovskite crystals, minimizing the charge recombination at the surface or grain boundaries by passivating these trap states has been identified to be one of the most important strategies for further optimization of device performance. Previous reports have mainly focused on surface passivation by inserting special materials such as graphene or fullerene between the electron transfer layer and the perovskite film. Here, we report an enhanced efficiency of mesoscopic perovskite solar cells by using graphene quantum dots (GQDs) to passivate the grain boundaries of CH3NH3PbI3. The highest efficiency (17.62%) is achieved via decoration with 7% GQDs, which is an 8.2% enhancement with respect to a pure perovskite based device. Various analyses including electrochemical impedance spectroscopy, time-resolved photoluminescence decay and open-circuit voltage decay measurements are employed in investigating the mechanism behind the improvement in device performance. The findings reveal two important roles played by GQDs in promoting the performance of perovskite solar cells – that GQDs are conducive to facilitating electron extraction and can effectively passivate the electron traps at the perovskite grain boundaries.
研究领域:
材料科学
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光伏技术
·
物理化学
✓ 已验证
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2014
·
IF 5.03
Xiaodong Ren,Wei Zi,Qiang Ma,Fengwei Xiao,Fei Gao,Sherry Hu,Yanhua Zhou,Shengzhong (Frank) Liu
It is known that the properly textured ZnO film can increase light-scattering and therefore improves light-trapping inside the solar cells, resulting in increased J sc value and consequently solar cell efficiency. Using a low cost solution-based electrochemical deposition , we have developed a ZnO thin film deposition process that offers fine-control of crystal orientation , surface morphology and texture by tuning an additive concentration. Using the optimized textured ZnO films, we have achieved superior light trapping performance especially in long wavelength spectrum ( λ >610 nm) comparing to the vacuum sputtered ZnO. Using single junction a-SiGe:H and multi-junction a-Si:H/a-SiGe:H/a-SiGe:H thin film solar cells, high quantum efficiency (current density) and solar cell efficiencies are attained. It demonstrates that the low cost electrochemical ZnO deposition is an effective method to prepare high quality ZnO film for solar cells.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Xue Wang,Huanxin Guo,Zonghao Lu,Xue Liu,Xiongfei Luo,Shujun Li,Shouxin Liu,Jian Li,Yongzhen Wu,Zhijun Chen
Films with the capacity for photoluminescence and haze, which can convert UV to visible light and enhance light management, are of great importance for optoelectronic devices. Here, taking advantage of the inherent fluorescence and self-assembly properties of lignin, we have developed a sustainable lignin-derived multifunctional dopant (L-MS-NPs) for fabricating optical films with haze, fluorescence, and room-temperature phosphorescence (RTP) together with poly(vinyl alcohol) (PVA). The optical films are used to improve the light-harvesting efficiency of solar cells. Specifically, attributed to the robust morphology in the film matrix, L-MS-NPs cause a rough morphology in the surface of an L-MS-NPs/PVA composite film, which eventually triggers the great optical haze. Additionally, L-MS-NPs inherit fluorescence properties from lignin and show fluorescence emission when embed in the film matrix. Moreover, the PVA film matrix can stabilize the excited triplet state, which finally induces RTP of L-MS-NPs. The combined haze, fluorescence, and RTP properties of the L-MS-NPs/PVA composite film enhances the power conversion efficiency (PCE) of dye-sensitized solar cells from ∼3.9 to ∼4.1%.
研究领域:
材料科学
·
可再生能源
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2017
·Vol. 13
·期 25
·1604153
·
IF 8.643
Wangen Zhao,Dong Yang,Shengzhong Frank Liu
Organic–inorganic hybrid perovskite as a kind of promising photovoltaic material is booming due to its low-cost, high defect tolerance, and easy fabrication, which result in the huge potential in industrial production. In the pursuit of high efficiency photovoltaic devices, high-quality absorbing layer is essential. Therefore, developing organic–inorganic hybrid perovskite thin films with good coverage, improved uniformity, and crystalline in a single pass deposition is of great concern in realizing good performance of perovskite thin-film solar cell. Here, it is found that the introduction of suitable amounts of LiI plays a dramatically positive role in enlarging the grain size and reducing the grain boundaries of absorbing layer. In addition, the carrier lifetime and built-in potential of the LiI doped perovskite device are observed to increase. Thus, it leads to about 15% gain in solar cell efficiency comparing to that without the LiI doping. Meanwhile, a hysteresis reduction is observed and 18.16% power conversion efficiency is achieved in LiI doped perovskite device, as well.
研究领域:
材料科学
·
光伏技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Xiaoqi Peng,Zhentao Ma,Zixu He,Rongfeng Tang,Jianyu Li,Shuwei Sheng,Ting Wu,Yue Hu,Zhiyuan Cai,Zequan Jiang,Yuchen Li,Changfei Zhu,Ruiguo Cao,Xusheng Zheng,Tao Chen
For solar cells, interfacial chemical coordination, carrier transport, and energy alignment play critical roles in carrier transport and determine the final energy conversion efficiency. As an emerging solar technology, high-efficiency Sb 2 (S,Se) 3 solar cells typically utilize cadmium sulfide (CdS) as the interfacial electron transport layer. However, the poor chemical and electrical contact between F-doped SnO 2 (FTO) substrate and CdS presents a significant challenge to improving device performance. Here, an ultrathin SnO 2 layer is introduced, fabricated via chemical bath deposition, between FTO and CdS to address the interfacial coordination and transport problem. The non-invasive depth analysis based on synchrotron radiation X-ray photoelectron spectroscopy shows that this interfacial engineering approach facilitates the formation of S-Sn bonding at the FTO/CdS interface, which cannot be achieved on the conventional inert FTO surface. Additionally, the existence of an interfacial SnO 2 layer reduces the sulfur vacancy defect (V S ) in the CdS films, enhancing both electrical conductivity and crystallinity. Therefore, the solar cell demonstrates significantly enhanced carrier separation and transport performance. Ultimately, the Sb 2 (S,Se) 3 solar cells achieve a record fill factor exceeding 73%, with a championefficiency of 10.58%. This study presents an effective interfacial engineering strategy to enhance charge transport properties for high-performance Sb 2 (S,Se) 3 solar cells.
研究领域:
材料科学
·
能源技术
✓ 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）