Effect of Illumination Wavelength on the Extension of the Space Charge Regions of Photovoltaic Capacitance Efficiency

Silicon - The effect of the illumination wavelength on the vertical parallel silicon solar cell n-p junction with electrical parameters by use extension space charge region method is theoretically...     

电阻率对N型单晶硅电池电性能影响的研究

近年来,P型太阳电池商业化生产效率已趋于稳定,N型太阳电池逐渐走向产业化.基于N+ Np+型铝背结单晶硅太阳电池,研究了电阻率为1 ～5.5 Ω·cm的N型硅衬底材料经过相同工艺后电池性能的差别,可以有效的节省成本.通过选用不同电阻率的N型硅片,经过相同的工艺制备N型单晶硅太阳电池,采用QSSPC、四探针、ECV、恒光源Ⅰ-Ⅴ测试系统对电池的少子寿命、方块电阻、磷元素分布、电性能进行测量.实验结果表明:虽然电池的少子寿命随电阻率的升高而升高,但是在方块电阻、磷元素分布、开路电压Voc、短路电流Isc、填充因子FF、转换效率Eff等方面不同电阻率的电池并无明显差异.     

Performance Analysis of an HJ-IBC Silicon Solar Cell in Ultra-High Temperatures: Possibility of Lower Reduction Efficiency Rate

The paper investigates the influence of various geometrical parameters (thickness of intrinsic a-Si, gap distance, n-type and p-type stripes) and the temperature on the performance of heterojunction interdigitated back contact (HJ-IBC) solar cell. There exists a strong correlation between the gap distance and the width of the n-type or p-type of the amorphous silicon (a-Si) layer as well as the thickness of the a-Si layer and the performance of the HJ-IBC silicon solar cells. It is shown that the defined reduction efficiency rate of an HJ-IBC silicon solar cell is lower than the reduction efficiency rate of conventional silicon solar, suggesting a better performance in the outdoor condition of the HJ-IBC solar cells. It is also argued that a temperature-dependent free HJ-IBC solar cell can be realized by tuning the intrinsic layer thickness. Furthermore, the comparison between top/rear contact HJ and HJ-IBC solar cell shows that HJ-IBC has the best performance in outdoor condition.

     

Effects of Solar Concentration on Efficiency for Vertical Multijunction Silicon Solar Cells

Silicon - In this work, we have analyzed the characteristic J-V of vertical multijunction solar cells. We have also offered a design of a monolithic compact solar module with cells electrically...     

Influence of Electrosprayed MoSe2 Antireflective Surface Coatings on Performance of Multicrystalline Silicon Solar Cell

Silicon - The present scenario indefinitely needs certain developments in the field of renewable energy as an effective replacement of conventional energy sources. Reflection loss in solar cell is...     

Silicon Solar Cell with Nanoporous Structure Formed on a Textured Surface

A nanoporous silicon (Si) surface was formed on monocrystalline silicon solar cells by electrochemical etching. The galvanostatic mode was applied to conventional n–p–p⁺ solar cells, which were fabricated by pyramidal texturing, phosphorous diffusion, screen-printing, rapid thermal firing, and laser isolation (effective area of 144.7 cm²). Without an additional antireflection layer such as SiN _x , the anodic reaction of the Si wafer could provide uniform porous layers on a pyramidal surface (111) with relatively low reflectance, and it would improve the photovoltaic performance.     

影响晶体硅太阳能电池片效率的因素分析及改善措施

光电转换效率是晶体硅太阳能电池的核心技术指标。本文分析了影响晶体硅太阳能电池效率的主要因素:光学损失和电学损失,总结了改善光学损失和电学损失的技术措施。目前业界在太阳能电池技术发展的重点在于改良现有制程与高效率的新结构。在太阳能电池效率的提升上必须仰赖更密切的产学合作、商讨才能够达到最佳经济效益,寻找到有效提升太阳能电池转换效率的方法。     

Development of the Monolayer Silicon Solar Cell Based on Photonic Crystals

Silicon - In the present paper, we have designed a structure of the PIN silicon solar cell. We optimize the thickness of each layer of the PIN silicon solar cell, and its effect on the optical...     

Use of Etching to Improve Efficiency of the Multicrystalline Silicon Solar Cell by Using an Acidic Solution

Surface texturing methods using an alkaline solution for monocrystalline Si (c-Si) solar cells have been widely accepted to improve cell performance. However, multicrystalline Si (mc-Si) cells are difficult to be texturized by alkaline etching, because the grains in the substrates are randomly oriented. In this study, we considered a HF/HNO ₃/H ₂O acid solution for texturing the mc-Si cells. The conversion efficiency of mc-Si solar cells textured with the solution (HF/HNO ₃/H ₂O = 30:1:2.5) has relatively high values. In our study, sufficient light confinement is achieved, which contributes to the improvement of both the short circuit current and the conversion efficiency of the acid textured cells. The optimal acid etching ratio HF:HNO ₃:H ₂O = 30:1:2.5 with etching time of 60 s and lowering 41.9 % of the R value can improve 111.8 % of the conversion efficiency (η) of the developed solar cell. More detailed information is used to measure the internal quantum efficiency (IQE) and the lifetime of minority carriers. Thus, the acid texturing approach is instrumental to achieve high efficiency in mass production using relatively low-cost mc-Si as the starting material with proper optimization of the fabrication steps.     

An Effective Approach on Attaining Enhanced Silicon Solar Cell Performance Through Sputter Deposited Perovskite Thin Films

Silicon - Antireflection coatings (ARCs) have become one of the key techniques for mass production of Si solar cells. They are generally performed by vacuum processes such as thermal evaporation,...     

An Investigation on a Crystalline-Silicon Solar Cell with Black Silicon Layer at the Rear

Crystalline-Si (c-Si) solar cell with black Si (b-Si) layer at the rear was studied in order to develop c-Si solar cell with sub-band gap photovoltaic response. The b-Si was made by chemical etching. The c-Si solar cell with b-Si at the rear was found to perform far better than that of similar structure but with no b-Si at the rear, with the efficiency being increased relatively by 27.7%. This finding was interesting as b-Si had a large specific surface area, which could cause high surface recombination and degradation of solar cell performance. A graded band gap was found to form at the rear of the c-Si solar cell with b-Si layer at the rear. This graded band gap tended to expel free electrons away from the rear, thus reducing the probability of electron-hole recombination at b-Si and improving the performance of c-Si solar cell.     

Grain Size Control of Tetragonal Zirconia Polycrystals Using the Space Charge Concept

Grain growth kinetics and grain-boundary segregation of 12Ce-TZP and 2Y-TZP, containing divalent to pentavalent cationic dopants, were studied. In all cases, normal grain growth follwing the parabolic growth relation was observed at higher temperatures. The mobility of grain boundaries was suppressed by the addition of divalent and trivalent cations, unchanged or enhanced by the addition of tetravalent and pentavalent cations. Larger cations have a stronger effect in suppressing grain growth. From ESCA, AES, and STEM analysis of the near grain-boundary regions, it is further concluded that only divalent and trivalent cations segregate. These observations can be satisfactorily rationalized using the space charge concept and the model of impurity drag.     

纯有机染料共敏化纳米晶太阳能电池的性能研究

采用曙红与香豆素混合的方法，配制成敏化剂修饰纳米晶薄膜．实验结果证明，这种共敏化的方法可以在可见光范围内有效提高电池的吸光度，使得电池的性能比单独使用曙红敏化有了大幅度提高．在模拟太阳光下，曙红与香豆素共敏化的电池的开路电压达到了532mV，短路电流达到了0．1125mA／cm^2。     

不同吸收层结构的非晶硅/锗太阳能电池转换效率的模拟计算(英文)

设计了2种太阳能电池结构：结构A为a-Si：H/a-Si0.65Ge0.35：H多吸收层结构;结构B为a-Si0.65Ge0.35：H单吸收层结构。采用AMPS-ID程序分析了2种电池结构的光电性质。模拟计算中光学吸收系数和缺陷浓度均采用实验数据以便确保模拟的可靠性。分析了2种电池结构的短路电流密度、断路电压、填充因子和转换效率。结果表明：对于结构A,当吸收层厚度达180nm时,转换效率达到饱和值6.88%;对于结构B,当吸收层厚度达45nm时,转换效率达到最大值3.44%;利用载流子产生和复合机制分析了采用多吸收层结构更有利于提高太阳能电池的转换效率。     

Study of the Enhancement of the Efficiency of the Monocrystalline Silicon Solar Cell by Optimizing Effective Parameters Using PC1D Simulation

Silicon - In this paper, simulation of a monocrystalline silicon solar cell was done using PC1D software. The impact of different solar cell parameters, with their effects on power and efficiency,...     

一种新型柔性硅太阳能电池装置的设计和搭建

利用微分几何思想,将面积较大的太阳能电池片用导线分别进行先串联后并联、先并联后串联两种方式连接,以柔性材料填充每个太阳能电池片之间的空隙来制备柔性太阳能电池装置。实验结果表明,以这种微分思想搭建的硅太阳能发电装置具有良好的柔性和较高的输出功率,并且以先串联后并联电路的最大输出功率略优于以先并联后串联电路。     

晶硅太阳电池上表面减反射膜的效果评价与分析

本文首先利用Silvaco-TCAD半导体器件仿真软件建立基于优化减反射膜结构的二维晶硅太阳电池结构.然后利用传递矩阵法(TMM),优化设计由多种常见介质膜材料组成的减反射膜结构.最后详细分析了SiO2/Si3N4和MgFJZnS双层减反射膜对太阳电池性能的影响.结果表明:在400 ～ 750 nm波长范围内,MgF2/ZnS减反射膜光反射损耗最小.在850～1200nm波长范围内,SiO2/Si3N4减反射膜光反射损耗最小.光反射损耗越小,太阳电池量子效率和转换效率越高.减反射膜的钝化效果对晶硅电池短波段(λ＜550 nm)光谱响应影响较大.通过光吸收效果和钝化效果对减反射膜性能进行综合评价,SiO2/Si3N4减反射膜优于MgF2/ZnS减反膜,更有利于晶硅太阳电池转换效率的提高.     

二元离子液体基染料敏化太阳能电池性能的研究

对6种用于染料敏化太阳能电池的二元离子液体电解质进行了考察,电池的光电转化效率在1.39%～4.98%,其中,1-乙基-3-甲基咪唑四氟硼酸盐/碘化1-丁基-3-甲基咪唑类电解质具有最高的光电转化效率。对这种二元离子液体电解质体系进一步优化,测试了不同碘浓度下相应染料敏化太阳能电池的效率、电化学阻抗谱(EIS)和紫外-可见吸收光谱(UV-vis)。结果表明,随着碘单质浓度的增大,铂-电解质界面的传荷电阻(RPt)、TiO2-电解质表面的传荷电阻(Rct)和瓦尔堡阻抗(Zw)逐渐减小,而电解质对紫外光的吸收逐渐增大,在AM1.5的条件下,当碘单质的浓度为0.25 mol/L时电池效率最高,达到5.20%。     

Triton X-100对染料敏化太阳电池性能影响的研究

采用无水相体系的胶体通过丝网印刷工艺制备TiO2薄膜电极,研究发现曲拉通（TritonX-100）可以明显改变TiO2电极显微结构,且对染料敏化太阳电池的性能影响显著.过少或过多的曲拉通都将导致开路电压、短路电流、填充因子以及效率的降低.由3gP25粉末配制的胶体中,曲拉通适宜的加入量约为0.8mL.     

晶体硅太阳能电池正面银导电浆料的研究进展

太阳能电池银浆是制造太阳能电池的主要原材料,太阳能电池银浆制造技术是高效低成本太阳能电池的关键技术。本文简介了太阳能电池结构,从太阳能电池导电银浆料的作用和性能要求出发,阐述了银浆料中各个组分对导电性能的影响、印刷适应性与导电性能的关系,并分析了国内外银浆料的现状与差异,指出了太阳能银浆料的未来发展趋势。