scholarly journals HIT Solar Cells with N-Type Low-Cost Metallurgical Si

2018 ◽  
Vol 2018 ◽  
pp. 1-5 ◽  
Author(s):  
Xing Yang ◽  
Jiangtao Bian ◽  
Zhengxin Liu ◽  
Shuai Li ◽  
Chao Chen ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Thin Layer ◽  
Conversion Efficiency ◽  
Impurity Concentration ◽  
Low Cost ◽  
Cell Performance ◽  
Software Simulation ◽  
Si Wafer ◽  
Compensation Level

A conversion efficiency of 20.23% of heterojunction with intrinsic thin layer (HIT) solar cell on 156 mm × 156 mm metallurgical Si wafer has been obtained. Applying AFORS-HET software simulation, HIT solar cell with metallurgical Si was investigated with regard to impurity concentration, compensation level, and their impacts on cell performance. It is known that a small amount of impurity in metallurgical Si materials is not harmful to solar cell properties.

Chemical Composition Dependence of Cu2ZnSnS4 Absorbers Fabricated by Sulfurization of Thermal Evaporated Metal Precursors and Solar Cell Performance

2015 ◽  
Vol 1738 ◽  
Author(s):  
Liyuan Zhang ◽  
Sreejith Karthikeyan ◽  
Mandip J. Sibakoti ◽  
Stephen A. Campbell
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Solar Cell ◽  
Chemical Composition ◽  
Conversion Efficiency ◽  
Small Deviation ◽  
Short Circuit ◽  
Cell Performance ◽  
Czts Thin Film ◽  
Solar Cell Performance

ABSTRACTWe investigate the synthesis of kesterite Cu2ZnSnS4 (CZTS) thin films using thermal evaporation from copper, zinc and tin pellets and post-annealing in a sulfur atmosphere. The effects of chemical composition were studied both on the absorber layer properties and on the final solar cell performance. It is confirmed that CZTS thin film chemical composition affects the carrier concentration profile, which then influences the solar cell properties. Solar cells using a CZTS thin film with composition ratio Cu/(Zn+Sn) = 0.87, and Zn/Sn = 1.24 exhibited an open-circuit voltage of 483 mV, a short-circuit current of 14.54 mA/cm2, a fill factor of 37.66 % and a conversion efficiency of 2.64 %. Only a small deviation from the optimal chemical composition can drop device performance to a lower level, which confirms that the CZTS solar cells with high conversion efficiency existed in a relatively narrow composition region.

Effect of Ge Thin Layer Position on Formation and Property of CZTSSe Thin Films and Solar Cells Prepared by Sputtering Method

2017 ◽  
Vol 895 ◽  
pp. 23-27
Author(s):  
Jin Ze Li ◽  
Hong Lie Shen ◽  
Yu Fang Li ◽  
Wei Wang
Keyword(s):  
Thin Films ◽  
Solar Cells ◽  
Solar Cell ◽  
Thin Layer ◽  
Conversion Efficiency ◽  
Bottom Layer ◽  
Window Layer ◽  
Structural Morphology ◽  
Ge Doping ◽  
Layer Position

In this work we deposited a Ge thin layer under or upon Cu-Zn-Sn-S precursor by sputtering, followed by selenization process to obtain Ge doped CZTSSe thin films. A comparison of structural, morphology and optoelectrical property on Ge doped CZTSSe thin films with different Ge layer position was studied. It was found that even a little amount of Ge doping could affect the crystallization of CZTSSe grains. The solar cells based on two kinds of precursors both had VOC improvement compared with undoped CZTSSe solar cell. However, due to the inner stress in CZTSSe thin film, cracks appeared between the interface of buffer layer and window layer in CZTSSe solar cell with Ge bottom layer, leading to the decrease of conversion efficiency. With the help of Ge in reducing bulk recombination, CZTSSe solar cell based on Cu-Zn-Sn-S precursor with Ge top layer had a conversion efficiency of 5.38%, in contrast to 3.01% and 4.30% of CZTSSe solar cell with Ge bottom layer and undoped CZTSSe solar cell, respectively.

Enhancing perovskite solar cell performance and stability by doping barium in methylammonium lead halide

2017 ◽  
Vol 5 (34) ◽  
pp. 18044-18052 ◽  
Author(s):  
Shun-Hsiang Chan ◽  
Ming-Chung Wu ◽  
Kun-Mu Lee ◽  
Wei-Cheng Chen ◽  
Tzu-Hao Lin ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Power Conversion ◽  
Perovskite Solar Cells ◽  
Perovskite Solar Cell ◽  
Cell Performance ◽  
Solar Cell Performance ◽  
Lead Halide

The power conversion efficiency of perovskite solar cells can be enhanced by using Ba2+-doped perovskite films.

Study of Black Center in Silicon Wafer for Solar Cell

2015 ◽  
Vol 815 ◽  
pp. 72-75
Author(s):  
Liu Qiao ◽  
Yan Jun Wang ◽  
Xue Nan Zhang ◽  
Zheng Liu ◽  
Jia Liu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Silicon Wafer ◽  
Conversion Efficiency ◽  
New Technology ◽  
Crystal Defects ◽  
Oxygen Distribution ◽  
Floating Zone ◽  
Oxygen Impurities ◽  
Si Wafer

The center of czochralski (CZ) wafer for solar cell often has black center, due to the existence of high impurities content, many defects such as dislocations. This has serious effect on solar cells’ conversion efficiency. To solve this problem, we developed a new kind of material-czochralski and floating zone (CFZ) silicon. But there is still black center in the CFZ-Si wafer with conventional process. In order to solve this problem successfully a new technology-alternant forward and reverse rotation was introduced. By testing the crystal defects, metal and oxygen impurities content, it has been found that the black center is related to oxygen distribution in the wafer. However since the content was very low and not enough to affect the solar cells’ conversion efficiency, which has been testified in solar cell. Therefore CFZ technology offers a new kind of silicon material, which can avoid the black center problem in CZ silicon wafer.

scholarly journals Fabrication of a Silicon Nanowire Solar Cell on a Silicon-on-Insulator Substrate

2019 ◽  
Vol 9 (5) ◽  
pp. 818 ◽  
Author(s):  
Shinya Kato ◽  
Yasuyoshi Kurokawa ◽  
Kazuhiro Gotoh ◽  
Tetsuo Soga
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Conversion Efficiency ◽  
Silicon Nanowire ◽  
Surface Recombination ◽  
Silicon On Insulator ◽  
Sinw Array ◽  
Amorphous Si ◽  
Insulator Substrate ◽  
Si Wafer

This study proposes metal-assisted chemical etching (MAE) as a facile method to fabricate silicon nanowire (SiNW) array structures, with high optical confinement for thin crystalline silicon solar cells. Conventional SiNW arrays are generally fabricated on Si wafer substrates. However, tests on conventional SiNW-based solar cells cannot determine whether the photo-current is derived from SiNWs or from the Si wafer. Herein, SiNW arrays were fabricated on a silicon-on-insulator substrate with a 10-μm-thick silicon layer for measuring the photocurrent of the SiNW only. The 9 μm-long p-type SiNW arrays were applied to a solar cell structure fabricated using an n-type H-doped amorphous Si layer, thereby confirming the photovoltaic effect. However, the device exhibited a conversion efficiency of 0.0017% because of a low short-circuit current (Jsc) and a low open-circuit voltage (Voc). The low Jsc resulted from a high series resistance and high absorption loss from the amorphous Si layer, whereas the low Voc resulted from the high surface recombination velocity of the SiNW array structure. Therefore, reducing the surface recombination of SiNW-based solar cells can improve their conversion efficiency.

Developments of Solar Cell Materials and Fabrication Technology and their Effects on Energy Conversion Efficiency

2013 ◽  
Vol 378 ◽  
pp. 293-301 ◽  
Author(s):  
Yin Dong Yang ◽  
Paul Wu ◽  
Jason Deng ◽  
Mansoor Barati ◽  
Alex McLean
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Energy Conversion ◽  
Conversion Efficiency ◽  
High Efficiency ◽  
Crystalline Silicon ◽  
Low Cost ◽  
Energy Conversion Efficiency ◽  
Black Silicon ◽  
Improve Energy Efficiency

This paper reviews the present status and future developments of solar cell materials for photovoltaic (PV) application. The solar cell made from different materials, such as silicon with different structures, cadmium telluride (CdTe), gallium arsenide GaAs), copper indium gallium diselenide (CIGS) and polymers are compared in theoretical ability, energy conversion efficiency, production and maintenance costs as well as environmental effects. Several important strategies to improve energy efficiency, such as anti-reflective coating (ARC), multi-junction concentrator and black silicon technique that improve the light-trapping and absorption properties of solar cells, are discussed. The review results show that the most efficient solar cells achieved 50% energy conversion, whereas silicon-based PV cells can reach 27%. Today the market is dominated by crystalline silicon in multi-crystalline and mono-crystalline forms due to it being the second most abundant element on the earths crust, and its nontoxic and environmental-friendly nature compared with other materials. Development of a new process with low cost, high efficiency and environment-friendly nature to produce solar grade silicon is of significant importance for the PV industry.

Mesoporous Bi2S3 nanorods with graphene-assistance as low-cost counter-electrode materials in dye-sensitized solar cells

Nanoscale ◽  
2014 ◽  
Vol 6 (23) ◽  
pp. 14433-14440 ◽  
Author(s):  
Sheng-qi Guo ◽  
Tian-zeng Jing ◽  
Xiao Zhang ◽  
Xiao-bing Yang ◽  
Zhi-hao Yuan ◽  
...  
Keyword(s):  
Solar Cells ◽  
Conversion Efficiency ◽  
Counter Electrode ◽  
Electrode Materials ◽  
Low Cost ◽  
Dye Sensitized Solar Cells ◽  
Hydrothermal Conditions ◽  
Catalytic Activities ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

In this work, we report the synthesis of mesoporous Bi2S3 nanorods under hydrothermal conditions without additives, and investigated their catalytic activities as the CE in DSCs by I–V curves and tested conversion efficiency.

scholarly journals Digital printing of a novel electrode for stable flexible organic solar cells with a power conversion efficiency of 8.5%

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
S. Wageh ◽  
Mahfoudh Raïssi ◽  
Thomas Berthelot ◽  
Matthieu Laurent ◽  
Didier Rousseau ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Organic Solar Cells ◽  
Power Conversion ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Solution Processed ◽  
Transparent Conducting

AbstractPoly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) mixed with single-wall nanotubes (SWNTs) (10:1) and doped with (0.1 M) perchloric acid (HClO4) in a solution-processed film, working as an excellent thin transparent conducting film (TCF) in organic solar cells, was investigated. This new electrode structure can be an outstanding substitute for conventional indium tin oxide (ITO) for applications in flexible solar cells due to the potential of attaining high transparency with enhanced conductivity, good flexibility, and good durability via a low-cost process over a large area. In addition, solution-processed vanadium oxide (VOx) doped with a small amount of PEDOT-PSS(PH1000) can be applied as a hole transport layer (HTL) for achieving high efficiency and stability. From these viewpoints, we investigate the benefit of using printed SWNTs-PEDOT-PSS doped with HClO4 as a transparent conducting electrode in a flexible organic solar cell. Additionally, we applied a VOx-PEDOT-PSS thin film as a hole transporting layer and a blend of PTB7 (polythieno[3,4-b] thiophene/benzodithiophene): PC71BM (phenyl-C71-butyric acid methyl ester) as an active layer in devices. Zinc oxide (ZnO) nanoparticles were applied as an electron transport layer and Ag was used as the top electrode. The proposed solar cell structure showed an enhancement in short-circuit current, power conversion efficiency, and stability relative to a conventional cell based on ITO. This result suggests a great carrier injection throughout the interfacial layer, high conductivity and transparency, as well as firm adherence for the new electrode.

Optimisation of diketopyrrolopyrrole:fullerene solar cell performance through control of polymer molecular weight and thermal annealing

2014 ◽  
Vol 2 (45) ◽  
pp. 19282-19289 ◽  
Author(s):  
Zhenggang Huang ◽  
Elisa Collado Fregoso ◽  
Stoichko Dimitrov ◽  
Pabitra Shakya Tuladhar ◽  
Ying Woan Soon ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Solar Cells ◽  
Solar Cell ◽  
Thermal Annealing ◽  
Bulk Heterojunction ◽  
Cell Performance ◽  
Polymer Molecular Weight ◽  
Solar Cell Performance ◽  
Heterojunction Solar Cells ◽  
Bulk Heterojunction Solar Cells

The performance of bulk heterojunction solar cells based on a novel donor polymer DPP-TT-T was optimised by tuning molecular weight and thermal annealing.

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