JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2019
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IF 3.261
Minghuan Gao,Lisha You,Linna Guo,Tiesheng Li
Polyhedron-like WO 3 (n-type WO 3 ) nanoparticles were synthesized by a simple hydrothermal reaction without using any template or surfactant. The Polyhedron-like WO 3 /Ag 2 CO 3 p-n junction photocatalyst was first synthesized by a simple impregnation-deposition way. The obtained samples were investigated by XRD, BET, XPS, SEM, TEM etc. The separation mechanisms of photo-induced electrons (e − ) and photo-induced holes (h + ) of the Polyhedron-like WO 3 /Ag 2 CO 3 p-n junction samples were characterized by PL technique, EIS and determination of active sites and species in the photocatalytic reactions. In this p-n junction structure, Polyhedron-like WO 3 nanoparticles adhered to the surface of the Rod-like p-type Ag 2 CO 3 nanoparticles. The Polyhedron-like WO 3 /Ag 2 CO 3 p-n junction photocatalyst showed much higher photocatalytic activity than both single materials for RhB degradation under UV–vis light irradiation, and even 17 times higher than commercial powders (P25) at the same circumstance. Even compared with the related photocatalyst, it still exhibits the highest photocatalytic ability. The highly enhanced photocatalytic of the Polyhedron-like WO 3 /Ag 2 CO 3 p-n junction photocatalyst can be attributed to extended absorption, more effective separation of photogenerated charges, the transfer rate of photo-induced charge carriers and forming of p-n junction system.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Chong Dong,Meng Li,Yue Zhang,Kai-Li Wang,Shuai Yuan,Femi Igbari,Yingguo Yang,Xingyu Gao,Zhao-Kui Wang,Liang-Sheng Liao
Perovskite solar cells have attracted worldwide attention as one of the key research areas in the field of thin-film photovoltaics. Although they exhibit easy solution processability, it is important to effectively control the crystallization of the light-absorbing layer, which affects the performance and stability of devices. Here, we present lead oxalate (PbC2O4) as a nonhalide lead constituent of the perovskite precursor solution, which contributes to anion replacement during thin film annealing. This strategy limits the perovskite nucleation rate and retards crystallization. As a result, we achieved excellent perovskite films with larger grains and fewer defects. The open-circuit voltage of the optimal device under 1 sun illumination rose to 1.12 V with a power conversion efficiency (PCE) of 20.20%. In addition, the indoor PCE at 1000 lux can reach 34.86%. This nonhalide lead compound dopant provides a guide for the crystallization of perovskite materials and paves a way for the fabrication of nonhalide perovskite solar cells.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2024
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IF 6.3
Xueting Zhang,Jicheng Zhang,Nan Tian,Zhaoxuan Huang,Shiyu Duan,Jilin Wang,Disheng Yao,Guoyuan Zheng,Yanhan Yang,Bing Zhou,Fei Long
Stability of perovskite is the main limitation of the commercialization of perovskite solar cells . Recent studies have shown that FA-Cs perovskites are expected to achieve ideal crystal structures with outstanding stability when FA content is 30 %. And its bandgap can be adjusted to 1.8 eV, making it suitable for a top battery in the tandem cell. However, when the content of Cs ions in the component exceeds 30 %, phase separation occurs. In this study, a Cs-rich Cs 0.7 FA 0.3 PbI 2 Br perovskite film was synthesized by using a 2D to 3D phase transition method. Through the high orientation of the 2D CsPbI 3 -FAI alloy-like phase and the anisotropic volatilization of FA, a well-oriented α-Cs 0.7 FA 0.3 PbI 2 Br perovskite phase is obtained. The α-Cs 0.7 FA 0.3 PbI 2 Br shows excellent thermal and UV stability and improved humidity stability. Meanwhile, the fabricated Cs 0.7 FA 0.3 PbI 2 Br perovskite solar cell achieved a competitive power conversion efficiency of 14.87 % successfully breaking the world record for this perovskite system. This further advances the research progress of Cs-rich perovskites in highly efficient and stable solar cells.
研究领域:
材料科学
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能源研究
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2025
·
IF 12.1
Zijun Yi,Long Zhang,Wenguang Zhang,Yihuai Huang,Yuchen Xiong,Changkai Huang,Guibin Shen,Abdul Basit,Xuehong Ren,Yubo Luo,Xin Li,Junyou Yang
Exploring and developing novel, low-cost, and environmentally friendly photovoltaic materials is a vital trend in the evolution of solar cell technology. The distinctive properties of alkali bismuth ternary sulfides have spurred increased research and application in optoelectronic devices. In this study, a novel method is reported for preparing NaBiS 2 film by sequential thermal evaporation of Na 2 S and Bi 2 S 3 layers followed by heating post-treatment for the first time, as well as the preparation of solar cells with NaBiS 2 as the light-absorbing layer. Based on X-ray diffraction and Raman analysis, the prepared NaBiS 2 film is confirmed to be a single-phase material, without the presence of any secondary phases. Additionally, the photoelectric characteristics of NaBiS 2 are investigated and incorporated this material into solar cell devices. By optimizing the device architecture, the solar cell utilizing NaBiS 2 as the light-absorbing layer achieved a photoelectric conversion efficiency of 2.91%, which is the highest efficiency reported for NaBiS 2 solar cells up to now. The research has provided a valuable perspective and path for the development of novel photovoltaic materials in the solar cell field.
研究领域:
材料科学
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光伏技术
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能源研究
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Energy Materials
·
2024
·
IF 5.4
Boyuan Yang,Wangshu Xu,Shu Tang,Wanfei Shi,Jingjing Dong,Hao Liu,Jie Xing,Huiying Hao
Stability is a crucial factor in the commercialization of perovskite solar cells (PSCs). CsPbBr3 PSCs, despite being less efficient than organic–inorganic hybrid PSCs, have a significant advantage in terms of stability. This makes them have promising potential for commercialization. In this study, high-quality all-inorganic CsPbBr3 perovskite films were prepared by using a multistep method in ambient air conditions. The crystalline quality of the CsPbBr3 films was improved by adding an appropriate amount of ammonium acetate (NH4Ac) to the PbBr2 precursor solution. Finally, carbon-based hole transport layer-free CsPbBr3 PSCs were fabricated by selecting NH4Ac-optimized light-absorbing layers and carbon electrodes that have a good commercialization prospect. Compared with control devices, the NH4Ac-optimized CsPbBr3 cell devices significantly improved in both efficiency and stability. The photoelectric conversion efficiency increased from 7.80% to 9.68%. This study provides an effective strategy for the preparation of high-quality films by using a multistep method and is also of great significance in promoting the commercialization of PSCs.
研究领域:
材料科学
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太阳能技术
✓ 已验证
产品关联
DOI
高影响因子
Alexandria Engineering Journal
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2025
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IF 6.8
Wenliang Fan,Qinliang Gao,Yingying Yang,Ligang Wang,Yanlai Wang,Haiyan Yao
In order to discuss the intermediate band (IB) formation mechanism, influence on photoelectric conversion, electron transition process and other photovoltaic properties of Ti-doped p-CuGaS 2 light absorption material, p-CuGaS 2 and Ti-doped p-CuGaS 2 were synthesized through low-cost heat injection and annealing. Structural characterization results indicate that Ti 3 + partially replaced Ga 3+ in the Ti-doped p-CuGaS 2 . Two additional sub-band absorption peaks of Ti-doped p-CuGaS 2 confirm the formation of an IB. The band structures are confirmed by optical analysis and ultraviolet photoelectron spectroscopy, and the electron transition processes—from the valence band (VB) to the conduction band (CB), the valence band (VB) to the IB, and the IB to the conduction band (CB)—are analyzed. The IB formation mechanism is discussed using the band structure and theoretical calculations derived from density functional theory. A thin-film solar-cell model with Ti-doped p-CuGaS 2 as the absorbing layer is created. Numerical simulations based on experimental data show that the photoelectric conversion efficiency increase from 15.06 % for CuGaS 2 to 25.46 % for Ti-doped p-CuGaS 2 because of the IB effect, which enhances the optical absorption and extends the spectral response range. In conclusion, the research findings will establish a fundamental basis for the exploration of intermediate-band solar cells based on copper gallium sulfide.
研究领域:
材料科学
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光伏技术
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理论计算
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2025
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IF 4.7
Qing Wang,Changcheng Lin,Xinyi He,Hui Zhang,DongMeng Chen,Shaowei Jin,Xueqin Zuo
This study presents a straightforward yet effective one-step hydrothermal method for the homogeneous deposition of ZnIn 2 S 4 (ZIS) onto carbon nanotubes (CNT), resulting in the formation of a unique plum-blossom ZIS@CNT heterostructure composite. The heterostructure formed between ZIS and CNT not only constructs an efficient electron transfer channel, but also provides an appropriate driving force for the transfer of electrons to active sites through the electron-withdrawing effect of carboxyl groups. When the ZIS@CNT composite was utilized as the counter electrode (CE) in a dye-sensitized solar cell (DSSC), the resulting DSSC exhibited an extremely high photoelectric conversion efficiency (PCE) of 9.35 %, which is 27.73 % higher than that of based on the traditional Pt CE (7.32 %). This study provides a new idea for the application of carbon nanomaterials and ZIS in DSSCs, and reveals the reasons for the excellent PCE of ZIS@CNT from the perspective of interface charge distribution.
研究领域:
材料科学
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纳米技术
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太阳能电池
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2021
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IF 6.024
Xiao-Lei Li,Ke-Cheng Long,Gao Zhang,Wei-Tian Zou,Shuang-Quan Jiang,De-Yi Zhang,Jiang-Qi Zhou,Mei-Jun Liu,Guan-Jun Yang
Integrating revolutionary perovskite solar cells with energy storage devices is a very promising technology to reduce the total cost of solar power utilization. Here, for the first time, lead-free (C6H5NH3)BiI4 perovskite materials were used as light absorbers in low-cost triple-layer mesoscopic perovskite solar cells with a power conversion efficiency of 0.35%. We fabricated a dense and pinhole-free (C6H5NH3)BiI4 perovskite film via homemade gas pump treatment equipment. We discovered storage characteristics in this carbon electrode-based, hole-conductor-free, and fully printable mesoporous solar cells infiltrated by (C6H5NH3)BiI4 perovskite, which indicates that this type of device might work under dark conditions. This study may provide some useful inspiration for the further exploration of the potential of (C6H5NH3)BiI4 as a lead-free candidate for the direct storage of electric energy in solar cells.
研究领域:
材料科学
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能源技术
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光伏器件
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2024
·Vol. 17
·期 2
·445
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IF 3.1
Xianglei Yu,Hu Sun,Zhuo Qian,Weichao Li,Wei Li,Fuchun Huang,Junpeng Li,Guoyou Gan
Silver powder, as the primary component of solar silver paste, significantly influences various aspects of the paste’s performance, including printing, sintering, and conductivity. This study reveals that, beyond the shape and size of the silver powders, their microstructure is a critical factor influencing the performance of both silver powders and silver pastes in solar cell applications. The growth process leads to the formation of either polycrystalline aggregated silver powder or crystal growth silver powder. Analyzing the performance characteristics of these different microstructures provides guidance for selecting silver powders for silver pastes at different sintering temperatures. Polycrystalline aggregated silver powder exhibits higher sintering activity, with a sintering initiation temperature around 450 °C. The resulting silver paste, sintered at 750 °C, demonstrates a low sheet resistance of 2.92 mΩ/sq and high adhesion of 2.13 N. This silver powder is suitable for formulating silver pastes with lower sintering temperatures. The solar cell electrode grid lines have a high aspect ratio of 0.37, showing poor uniformity. However, due to the high sintering activity of the silver powder, the glass layer dissolves and deposits more silver, resulting in excellent conductivity, a low contact resistance of the silver electrode, a low series resistance of the solar cell of 1.23 mΩ, and a high photoelectric conversion efficiency of 23.16%. Crystal growth silver powder exhibits the highest tap density of 5.52 g/cm3. The corresponding silver paste shows improved densification upon sintering, especially at 840 °C, yielding a sheet resistance of 2.56 mΩ/sq and adhesion of 3.05 N. This silver powder is suitable for formulating silver pastes with higher sintering temperatures. The solar cell electrode grid lines are uniform with the highest aspect ratio of 0.40, resulting in a smaller shading area, a high fill factor of 81.59%, and a slightly higher photoelectric conversion efficiency of 23.17% compared to the polycrystalline aggregated silver powder.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2019
·Vol. 11
·期 32
·15083-15090
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IF 6.97
Liming Liu,Xueping Yu,Zichuan Yi,Feng Chi,Honghang Wang,Yongfang Yuan,Dongliang Li,Kai Xu,Xiaowen Zhang
The solar-to-electric conversion efficiency of mesoscopic solar cells is highly dependent on electron extraction under solar irradiation and determines the charge recombination processes within devices. Boosting charge transfer via building energy level alignment has been proved to be a promising method to enhance the output power of solar cells. In the current work, we present the successful fabrication of functional biomass-converted carbon quantum dots with graded energy levels by doping nitrogen or sulphur atoms from lotus root powder. When employed as light absorbers for mesoscopic solar cells, light harvesting and electron extraction can be markedly increased arising from the band alignment of graded carbon quantum dots, yielding maximal power conversion efficiencies of 0.158% and 0.208% for bi- and tri-cascaded photovoltaics, respectively. The primary results demonstrate that the employment of an energy-graded architecture is a promising strategy to optimize the device output. Following this line of thought, we further fabricate a co-sensitized device by integrating graded carbon quantum dots with N719 dyes to enhance the electron extraction capability. The final device yields an efficiency as high as 9.04%, showing the potential application of carbon quantum dots in high-performance 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
ACS Applied Energy Materials
·
2021
·
IF 6.024
Ya Xu,Yin Huang,Hang Zhong,Wenbo Li,Duoling Cao,Congqiang Zhang,Huaxi Bao,Zhiguang Guo,Li Wan,Xu Zhang,Xiuhua Zhang,Yuebin Li,Xianbao Wang,Dominik Eder,Shimin Wang
Methylammonium lead iodide perovskite (MAPbI3) demonstrates the disadvantage of poor long-term stability. Additive engineering is an effective measure to address this issue. We have successfully used an organic molecule called p-methylbenzoammonium iodate (p-MePMAI) as an additive to a perovskite precursor. Results showed that p-MePMAI is an excellent additive with functional groups of benzyl and ammonium ions that can improve the performance and stability of carbon counter electrode (CE)-based MAPbI3 perovskite solar cells. Benzene rings and ammonium ion functional groups of p-MePMAI can electrostatically interact with MAPbI3 when a proper amount of p-MePMAI is added. Moreover, the conjugated structure of the benzene ring can effectively reduce the number of trap states in the perovskite film and significantly inhibit nonradiative recombination, further promoting charge transport. The photoelectric conversion efficiency (PCE) of our prepared carbon CE-based MAPbI3 perovskite solar cells increases from 12.76 to 14.54% with the optimization of p-MePMAI. Notably, the device optimized using p-MePMAI additives maintains 85% of the initial PCE after 500 h.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2018
·
IF 3.235
Shuwei Cai,Shuzhong Wang,Dongxu Wei,Haijun Niu,Wen Wang,Xuduo Bai
Four kinds of novel polyamides (PAs) containing pyrrole core with different triarylamine (TAA) groups were designed and synthesized. These PAs exhibit good solubility in various organic solvents and excellent thermal stability. The two PAs prepared from cyclohexane-1,4-dicarboxylic acid exhibit fluorescence maximum at 475–476 nm with quantum yields up to 39.0% and 57.3% in N , N -dimethylacetamide (DMAc) solution. Furthermore, the polymer films show reversible electrochemical redoxidation with color changing from yellowish to khaki to dark blue. Especially, the films have high coloration efficiency (up to 143 cm 2 C −1 at 750 nm) and after over 1000 s the films still exhibit continuous cyclic stability of electrochromism . What's more, these PAs could be used as the photoelectric conversion material owing to their excellent optoelectronic properties.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）