Small
·
2025
·
IF 12.1
Qianfeng Gao,Jianghao Liu,Zhiyuan Xu,Yu Yan,Wei Li,Taiqiang Wang,Hongyu Dun,Jiakai Zhou,Ke Tao,Baojie Yan,Bo Yu,JinChao Shi,Qian Huang,Xiaodan Zhang,Ying Zhao,Guofu Hou
Dopant-free crystalline silicon (c-Si) solar cells face critical challenges in hole transport layer (HTL) design, where conventional molybdenum oxide (MoO x ) contacts suffer from interface oxidation and insufficient electron blocking. While self-assembled monolayers (SAMs) demonstrate potential in organic photovoltaics, their application in silicon-based HTLs remains unexplored. In this study, a novel organic SAM (2PACz) is proposed, where phosphonic acid (PA) groups form strong coordination bonds with MoO x as HTL, aiming to improve cell performance via both chemical and field-effect passivation. The incorporation of 2PACz raises the work function of MoO x by 0.66 eV and significantly improves the minority carrier lifetime, which, in turn increases the built-in potential ( V bi ) to 1.06 V. These improvements contribute to a boost in both open-circuit voltage ( V oc ) and short-circuit current ( J sc ). Finally, the solar cell with 2PACz/MoO x -Au NPs-MoO x (MAM) stack achieves a V oc of 753.3 mV, a J sc of 40.10 mA cm − 2 , a fill factor ( FF ) of 79.12%, and a conversion efficiency ( E ff ) of 23.90%. The application of 2PACz in the HTL significantly enhances solar cell performance, offering a novel strategy for interface optimization in c-Si solar cells and other optoelectronic devices.
研究领域:
材料科学
·
光伏技术
·
半导体物理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Frontiers in Materials
·
2024
·
IF 2.6
Yu Xianglei,Li Wei,Sun Hu,Qian Zhuo,Li Junpeng,Yu Yang,Gan Guoyou
The Te-based glass powder exhibits distinctive characteristics such as a low melting temperature and high chemical stability, rendering it a focal point of research in the realm of glass powder applications for solar cells. In this investigation, a pioneering Ge-containing Te-based lead-free glass powder was synthesized, and the influence of GeO2 content on critical parameters such as glass transition temperature (Tg), high-temperature fluidity, high-temperature wettability, acid and alkali resistance, as well as the network structure of the glass, was systematically explored. At an optimal GeO2 content of 8%, the glass powder displayed the lowest Tg (437°C), accompanied by a subdued crystallization reaction. The high-temperature fluidity and wettability exhibited favorable characteristics, indicating that the inclusion of GeO2 in the glass powder resulted in an enhanced interface contact. Building upon this foundation, techniques to augment the Ag+ content within the glass powder were investigated, along with the interaction between Ag+ and the SiNx anti-reflection layer or silicon on the surface of crystalline silicon solar cells. It was discerned that the Ag+ content in the glass powder significantly influences the deposition of silver microcrystals on the surface of crystalline silicon, thereby impacting the contact resistance of the solar cell. Then influences the series resistance and photoelectric conversion efficiency of the solar cell.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Solar RRL
·
2022
·Vol. 6
·期 11
·2200336
·
IF 9.173
Jian Song,Yifan Ren,Shijie Gong,Liang Zhao,Wufan Xuan,Lei Zhu,Yulong Zhao,Yinghuai Qiang,Lili Gao,Sheng Huang
Crystal silicon solar cells being the most successful photovoltaic devices have prevailed in the energy market for decades. To further improve the device performance, photon management is necessary. Herein, a CsPbBr 3 –Cs 4 PbBr 6 perovskite quantum dot@ZnO/ethylene vinyl acetate copolymer downshifting composite film is coated on the silicon solar cell. This downshifting composite film helps to convert high-energy (UV-blue) photons to relatively low-energy photons with a wavelength at about 500 nm, which possess higher sensitivity in silicon solar cells. The effects of tetra- n -heptylammonium bromide and Zn(C 2 H 5 ) 2 on composition, optical and luminescence properties of perovskite quantum dots are thoroughly investigated, and a clean quantum dot solution with strong luminescent intensity can be obtained. The perovskite quantum dot@ZnO/ethylene vinyl acetate composite film absolutely improves the efficiency of silicon solar cells by 1.18%. The value is much higher than pure ethylene vinyl acetate (0.42%) and composite film without ZnO (0.57%). Moreover, ZnO inclusion can inhibit Cs and Pb leakage and maintain the device working stability, which is helpful for their commercial application in the future. This study further reveals that the enhancement lies in carrier relaxation energy loss reduction. Herein, a low-cost downshifting composite film with excellent environmental stability for silicon solar cells applications is proposed.
研究领域:
材料科学
·
能源技术
·
光伏领域
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Yiqian Cui,Yuchen Xiong,Jiawen Wang,Yu Zhang,Wei Yu
The formation of ohmic contact between the carrier transport layer and the electrode is necessary for the high-performance solar cells. However, in the PEDOT: PSS/Si hybrid solar cells, the low conductivity of PEDOT: PSS and the high contact barrier between PEDOT: PSS and Ag electrodes result in high contact resistance, which inhibits the improvement of cell efficiency. In this work, the above two issues were improved simultaneously by simply introducing a MoO X interface layer between PEDOT: PSS and Ag electrodes. The detailed characterization and analytical results show that the quinoid structure of PEDOT: PSS films and the Mo 5 + with metallization electricity properties increased significantly due to the interaction between PEDOT: PSS and MoO X , reducing the resistivity of PEDOT: PSS. At the same time, the contact potential barrier was reduced due to the formation of MoO X /Ag composite electrodes with high work function (WF). In addition, the PEDOT: PSS/MoO X films with higher WF led to a higher built-in electric field. Due to these collaborative improvements, a PEDOT: PSS/Si solar cell with a high power conversion efficiency (PCE) of 15.02 % was achieved. This work provides a new idea to modify the interface between PEDOT: PSS and Ag electrodes for improving the PCE of PEDOT: PSS/Si hybrid solar cells.
研究领域:
材料科学
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能源技术
·
界面工程
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 20
·7017-7025
·
IF 4.39
Yonghui Xu,Liang Zhang,Langping Dong,Shuwen Yin,Xiudi Wu,Hongpeng You
Novel single-doped and codoped SrGd2Al2O7-based (SGA) phosphors with tunable emission were synthesized via the solid-state reaction approach. The optimal SGA:0.0008Mn4+ phosphor presents an emission band peaking at 709 nm and shows great red luminescence properties. With the incorporation of Nd3+/Yb3+ into SGA:0.0008Mn4+, an efficient energy transfer Mn4+ → Nd3+/Yb3+ was observed. When Nd3+ and Yb3+ were codoped into SGA:0.0008Mn4+, an energy transfer mechanism from Mn4+ to Nd3+ to Yb3+ was found on the basis of the energy transfer mediation of Nd3+ connecting the Mn4+ and Yb3+ luminescent centers. It results in a strong near-infrared emission in the spectral region of high response of c-Si solar cells, which suggests a potential approach to improve the energy conversion efficiency of c-Si solar cells. The findings offer a novel route to design new down-conversion luminescent materials for the c-Si solar cells.
研究领域:
材料科学
·
无机化学
·
光电子学
·
新能源材料
·
固体物理
✓ 已验证
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2022
·
IF 4.644
Can Liu,Lei Zhang,Guoqiang Yu,Tao Wang,Xiaoping Wu,Lingbo Xu,Ping Lin,Can Cui,Xuegong Yu,Peng Wang
Near stoichiometric molybdenum oxide (MoO 3-x ) film has attracted extensive interest as superior hole-selecting material in optoelectronic devices. However, the existence of multi-oxidation states significantly affects its work function and carrier transport behaviors. In this work, we have proposed a facile way to modulate the oxidation states of solution-processed MoO 3-x with vanadium ions (V 5+ ) doping (MoO 3-x :V), beneficial for improved hole-selecting contact performance with silicon . As the doping concentration of V 5+ increases, oxygen vacancies and reduced Mo 5+ ions reduce, resulting in the increase of work function of MoO 3-x film. The effective carrier lifetime of MoO 3-x deposited Czochralski silicon has been largely improved from 60.1 to 153.0 μs (Δn = 10 15 cm −3 ) at the optimized doping concentration of 5%, and the contact resistivity is reduced from 9.1 to 2.1 Ω cm 2 simultaneously. The finished solar cells with the scheme of Ag/MoO 3-x :V/n-Si have exhibited significantly improved conversion efficiency. Our results have demonstrated a very promising way to modulate the stoichiometry and work function of MoO 3-x film, which has great potential in solar cell and light emitting diode applications.
研究领域:
材料科学
·
光电子学
·
可再生能源
✓ 已验证
DOI
高影响因子
International Journal of Materials Research
·
2021
·Vol. 112
·期 6
·457-464
·
IF 0.748
Dunying Deng,Zhaoyong Chen,Yongle Hu,Yonggang Tong,Xiubing Liang
Corrugated-surface silver powders were prepared for front contact pastes of silicon solar cells. The effects of using different pH controlling agents on the powder diameter, morphology, and conversion of silver ions to silver powders were investigated. Silver powders with wrinkled surface and 100% conversion were prepared, and ground by using spiral jet milling and tumbling ball milling, respectively. Silver powders ground by using spiral jet milling had better size distribution, higher tap density, and corrugated surface, the tap density of silver powders ground by using spiral jet milling was 6.52 g cm –3 . The silver powders were used to prepare front contact pastes of silicon solar cells, the aspect ratio of printed gridlines was 0.34.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Liuxue Sun,Jihuai Wu,Weichun Pan,Lina Tan,Xia Chen,Chunyan Deng,Qi Chen,Yu Lin,Miaoliang Huang,Zhang Lan
With the development of the Internet of Things and wearable devices, flexible photocapacitors capable of both energy harvesting and storage have attracted significant attention. However, issues such as low overall conversion efficiency, poor stability, and low energy density in flexible devices urgently need to be addressed. In this work, a self-charging photocapacitor is designed by integrating a flexible quasi-solid-state supercapacitor with two silicon solar cells connected in series, and the matching conditions between photovoltaic conversion unit and energy storage unit are optimized. The best-performing photocapacitor achieve a coupling efficiency of 95.84 %, a Joule efficiency of 76.90 %, and an overall conversion efficiency of 13.44 %, with a high specific capacitance (149.29 mF∙cm −2 ) and an excellent energy density (19.31 μWh∙cm −2 ), along with great stability in photo-charging/dark-discharge cycles. This study provides new insights for the current research on flexible self-powered systems.
研究领域:
能源材料
·
光电化学
·
储能技术
✓ 已验证
产品关联
DOI
高影响因子
Advanced Materials Interfaces
·
2022
·Vol. 9
·期 10
·2102374
·
IF 6.389
Zongtao Liu,Wenjie Lin,Zhiming Chen,Daming Chen,Yifeng Chen,Hui Shen,Zongcun Liang
Nonstoichiometric vanadium oxide V 2 O x has been demonstrated to serve as a hole-selective contact in crystalline silicon solar cells. A reaction between V 2 O x deposited by thermal evaporation and silicon can, however, result in a decreased work function (WF) and reduce hole selectivity. A straightforward and workable solution is presented in this study, which partially restores the WF of V 2 O x as deposited on silicon and improving solar cell efficiency, avoiding the use of amorphous silicon. Incorporating WO x into the Ag/V 2 O x 1 /Si structure, to form Ag/WO x /V 2 O x 2 /Si, x 1 < x 2 , the WF determined by nonstoichiometric ratio, i.e., x , of V 2 O x increases, enhancing the field passivation effect and reducing the rear recombination, which leads to a 11 mV increase in open-circuit voltage and a 0.90 mA cm −2 increase in short-circuit current. Finally, the solar cell gains an absolute improvement of ≈1.0% in power conversion efficiency.
研究领域:
材料科学
·
光伏技术
✓ 已验证
DOI
高影响因子
Solar RRL
·
2021
·Vol. 5
·期 5
·2100064
·
IF 8.582
Zhiyuan Xu,Shanglong Peng,Hao Lin,Shuhao Tian,Zilei Wang,Jian He,Lun Cai,Juan Hou,Pingqi Gao
Compared with vacuum evaporation, metal oxides deposited by solution process exhibit advantages, for example, dopants can be easily incorporated in a wide range and the contents are easy to be regulated by changing the composition of precursors. Herein, solution-processed p-type copper-doped chromium oxide (Cu:CrO x ) films with tunable oxygen vacancy are demonstrated via a postannealing process. The synthetic and postannealing temperature have a significant impact on the chromium cation oxidation state in the Cu:CrO x films, leading to the variation of work function for the oxide films. By adjusting the work function of Cu:CrO x films, a low contact resistivity of 95 mΩ cm 2 can be realized for the Ag/Cu:CrO x /p-Si contact. Finally, the optimized Cu:CrO x films are used as the hole transporting layer in c-Si solar cells, showing an increased power conversion efficiency from 15.2% (without Cu:CrO x ) to 16.9% (with Cu:CrO x ). The results show an effective stage to use p-type metal oxides as a hole-selective layer in c-Si 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
Nanomaterials
·
2022
·Vol. 12
·期 23
·4318
·
IF 5.719
Linyi Zeng,Lun Cai,Zilei Wang,Nuo Chen,Zhaolang Liu,Tian Chen,Yicong Pang,Wenxian Wang,Hongwei Zhang,Qi Zhang,Zuyong Feng,Pingqi Gao
Crystalline silicon solar cells produced by doping processes have intrinsic shortages of high Auger recombination and/or severe parasitic optical absorption. Dopant-free carrier-selective contacts (DF-CSCs) are alternative routines for the next generation of highly efficient solar cells. However, it is difficult to achieve both good passivating and low contact resistivity for most DF-CSCs. In this paper, a high-quality dopant-free electron-selective passivating contact made from ultra-low concentration water solution is reported. Both low recombination current (J0) ~10 fA/cm2and low contact resistivity (ρc) ~31 mΩ·cm2are demonstrated with this novel contact on intrinsic amorphous silicon thin film passivated n-Si. The electron selectivity is attributed to relieving of the interfacial Fermi level pinning because of dielectric properties (decaying of the metal-induced gap states (MIGS)). The full-area implementation of the novel passivating contact shows 20.4% efficiency on a prototype solar cell without an advanced lithography process. Our findings offer a very simple, cost-effective, and efficient solution for future semiconductor devices, including photovoltaics and thin-film transistors.Keywords:c-Si;solar cell;electron-selective contact;dopant-free;passivation;contact resistivity
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
Journal of Energy Chemistry
·
2021
·
IF 9.676
Pengjie Hang,Jingkun Cong,Ge Li,Lijian Zuo,Chenxia Kan,Biao Li,Jiangsheng Xie,Yuxin Yao,Ying Wang,Hongzheng Chen,Deren Yang,Xuegong Yu
Perovskite/Silicon (PS) tandem solar cells have attracted much interest over recent years. However, the most popular crystalline silicon solar cells utilized in tandems require complicated fabrication processes mainly including texturization, diffusion, passivation and metallization, which takes up much cost in photovoltaic market. Here, we report a facile graphene/silicon (Gr/Si) solar cell featuring of low-temperature (≤200 °C) processing and an efficiency of 13.56%. For reducing the heat dissipation loss of high energy photon, the perovskite solar cell (PSC) with a wide band gap of 1.76 eV was adopted as the top cell for the tandem. To reduce the loss of parasitic absorption in hole transport layers (HTLs), thickness of Spiro-OMeTAD is re-optimized by compromising the efficiency and the optical transmittance of the devices. As a result, the semitransparent top perovskite solar cell yields a highest efficiency of 13.35%. Furthermore, we firstly achieved a low-temperature-processed four-terminal (4-T) perovskite/graphene-silicon (PGS) heterojunction tandem solar cell with the efficiency of 20.37%. The levelized cost of electricity (LCOE) of PGS 4-T modules were estimated to a competitive price, exhibiting much greater potential for practical application compared to that of PS 4-T modules.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）