太阳能电池分选设备视觉定位系统

为了提高分选设备测试定位精度,提升产能,介绍了XXY定位平台的原理与实现方法、视觉定位图像处理的步骤及其计算方法以及图像处理计算结果输出到XXY平台实现定位功能的方法.在实际的生产中,验证了该方法的实用性,基于XXY高速测试台的视觉定位系统能够快速、精确地对电池片进行定位和矫正,能适用电池片大偏差的工况.大大地提升了电...     

以太网通信在太阳能电池测试分选设备中的应用

太阳能电池测试分选设备用于晶体硅太阳能单体电池的性能测试和自动分选,位于太阳能电池生产的最后一道工序,由上料台、定位机构、传送装置、测试座、分选机构、太阳模拟器、控制系统等部分组成。介绍了中国电子科技集团公司第四十八研究所开发的国内首台全自动晶体硅太阳能电池测试分选设备,重点介绍了该设备太阳模拟器和控制系统之间的数据交换方式。即采用进口的高速高精度可编程控制器(PLC)为控制核心,通过以太网通信的方式实现了PLC和太阳模拟器之间的高速数据交换。     

太阳能电池测试分选设备运动控制系统设计

太阳能电池测试分选设备用于晶体硅太阳能电池的性能测试和自动分选。介绍了中国电子科技集团公司第四十八研究所开发的全自动晶体硅太阳能电池测试分选设备的系统构成,重点对该设备的运动控制系统进行描述。在该设备中,以进口可编程控制器(PLC)为核心,通过采用高精度运动控制模块实现对分选机各功能部件的高精度运动控制。     

全自动太阳能电池测试分选设备的研制

太阳能电池测试分选设备是晶体硅太阳能电池生产专用设备,可用于太阳能电池转换效率以及电性能参数测量。所有的测量结果可以自动分类,自动保存。该设备在测试系统设计、分选结构设计、步进电机精密驱动、高速数据交换和电气控制等技术方面达到较高水平。该设备具有全自动化,操作简便,测试精确,运行稳定,碎片率低、生产效率高等特点,性能完...     

基于HaIcon太阳能电池片焊接缺陷检测

目前太阳能电池片的焊接缺陷检测主要是由人工视觉检测来完成,该种检测防水不但检测效率低而且由于人眼的视觉疲劳,很容易出现误判的现象.针对这样的情况,文中提出了一种基于Halcon的太阳能电池片焊接缺陷的检测方法,该种方法不但检测效率高,而且能够保证检测的准确率.     

太阳能电池片硼源扩散综述

对国内近十年来硼扩散技术的进展进行了介绍,引用不同科研人员的研究成果说明以下结论:采用旋涂SiO_2纳米浆料作为硼源,能够改善太阳能电池片扩散区域方块电阻的均匀性,粒径越小,均匀性越好;改善管内进气方式,增大硼源进气口距离太阳能电池片的距离,能够改善太阳能电池片扩散区域方块电阻的均匀性;在BBr_3液态源高温扩散过程中引入二氯乙烯,能够提高硼扩散的片内均匀性和片间均匀性。     

太阳能电池片综合参数图像检测装置研究

随着人类对能源需求的不断增长,太阳能电池片作为光伏发电的载体,也成为人们关注的焦点,本文对生产线上太阳能电池片综合参数图像检测装置做了相关研究,综合参数包括色差,正反,定位,缺角,断栅。实验证明本文算法简单,并且检测内容全面,效率高。     

基于图像处理的低效率太阳能电池片自动检测

太阳能作为一种普遍均匀、清洁环保的绿色能源,具有较大的开发潜力。针对多晶硅太阳能电池片生产加工过程中存在的各种缺陷,尤其是低效率(黑心)片对太阳能电池片能效的影响,文中研究了一种基于图像处理的低效率太阳能电池片自动检测方法。首先对多晶硅太阳能电池片的相关概念以及低效率(黑心)片产生的原因做了分析,并在此基础上,对基于电致发光图像处理的自动检测方法进行了研究,给出了检测原理和检测系统结构,重点对图像处理技术进行了探讨,通过峰值二值化方法对电致发光图像灰度进行二值化处理,避免了给定阈值二值化处理的不足,同时给出了算法实现流程及实验结果。所设计的自动检测方法为实现低效率太阳能电池片检测提供了一定的理论基础。     

CAN总线在太阳能电池测试分选机中的应用

随着工业生产现代化的发展,CAN总线由于抗干扰能力强,数据传输快,越来越多地应用到工业控制系统中。本文详细介绍了CAN总线,重点阐述了CAN总线控制系统在太阳能电池测试分选机中的硬件搭建方法。从实际应用情况来看,该系统不仅在信息传输的安全性、准确性和实时性方面均能满足控制的要求,而且具有很高的可靠性。     

硅基纳米结构的减反特性及其在太阳能电池中的应用

本文利用湿法化学腐蚀方法在硅基抛光衬底以及金字塔制绒的衬底上成功制备了纳米线阵列结构。在300~1000纳米波段,硅纳米线结构以及纳米线-金字塔混合结构都表现出了很好的减反特性,其平均反射率分别为2.53%、8%。利用传统工艺,我们在125mm125mm²的硅衬底上成功制备了短路电流密度为34.82mA/cm,开路电压为 594mv,效率为12.45%的纳米线太阳能电池。我们发现钝化对纳米结构的太阳能电池很重要,沉积钝化层之后可以将开路电压由420mv提高到560mv。我们通过分析所制备的太阳能电池的基本参数以及外量子效率,系统研究了硅基纳米结构太阳能电池的效率损失机制。实验证实钝化层以及电极的接触特性对提高纳米线太阳能电池的效率具有重要作用,并发现在已含PN结的硅衬底上制备纳米结构有助于提高太阳能电池的性能。     

Antireflection properties and solar cell application of silicon nanoscructures

Silicon nanowire arrays（SiNWAs） are fabricated on polished pyramids of textured Si using an aqueous chemical etching method.The silicon nanowires themselves or hybrid structures of nanowires and pyramids both show strong anti-reflectance abilities in the wavelength region of 300-1000 nm,and reflectances of 2.52%and less than 8%are achieved,respectively.A 12.45%SiNWAs-textured solar cell（SC） with a short circuit current of 34.82 mA/cm² and open circuit voltage(K_oc) of 594 mV was fabricated on 125×125 mm² Si using a conventional process including metal grid printing.It is revealed that passivation is essential for hybrid structure textured SCs,and K_oc can be enlarged by 28.6%from 420 V to 560 mV after the passivation layer is deposited.The loss mechanism of SiNWA SC was investigated in detail by systematic comparison of the basic parameters and external quantum efficiency（EQE） of samples with different fabrication processes.It is proved that surface passivation and fabrication of a metal grid are critical for high efficiency SiNWA SC,and the performance of SiNWA SC could be improved when fabricated on a substrate with an initial PN junction.     

CdTe solar cell in a novel configuration

Polycrystalline thin‐film CdTe/CdS solar cells have been developed in a configuration in which a transparent conducting layer of indium tin oxide (ITO) has been used for the first time as a back electrical contact on p‐CdTe. Solar cells of 7·9% efficiency were developed on SnO_x:F‐coated glass substrates with a low‐temperature (<450°C) high‐vacuum evaporation method. After the CdCl₂ annealing treatment of the CdTe/CdS stack, a bromine methanol solution was used for etching the CdTe surface prior to the ITO deposition. The unique features of this solar cell with both front and back contacts being transparent and conducting are that the cell can be illuminated from either or both sides simultaneously like a ‘bi‐facial’ cell, and it can be used in tandem solar cells. The solar cells with transparent conducting oxide back contact show long‐term stable performance under accelerated test conditions. Copyright © 2004 John Wiley & Sons, Ltd.     

Photon recycling in the graded bandgap solar cell

We derived a general integral expression for the carrier radiative recombination rate in solar cells. The photon Boltzmann equation is solved taking into account the photon recycling effect inside the cell and assuming arbitrary spatial variation of the absorption coefficient. This expression can thus be used for graded bandgap solar cells. Copyright © 2006 John Wiley & Sons, Ltd.     

Ultrathin and micro‐sized solar cell performance optimization via simulations

Back‐contacted, ultrathin (<10 µm), and submillimeter‐sized solar cells made with microsystem tools are a new type of cell that has not been optimized for performance. The literature reports efficiencies up to 15% using thicknesses of 14 µm and cell sizes of 250 µm. In this paper, we present the design, conditions, and fabrication parameters necessary to optimize these devices. The optimization was performed using commercial simulation tools from the microsystems arena. A systematic variation of the different parameters that influence the performance of the cell was accomplished. The researched parameters were resistance, Shockley–Read–Hall (SRH) lifetime, contact separation, implant characteristics (size, dosage, energy, and ratio between the species), contact size, substrate thickness, surface recombination, and light concentration. The performance of the cell was measured with efficiency, open‐circuit voltage, and short‐circuit current. Among all the parameters investigated, surface recombination and SRH lifetime proved to be the most important. Through completing the simulations, an optimized concept solar cell design was introduced for two scenarios: high and low quality materials/passivation. Simulated efficiencies up to 23.4% (1 sun) and 26.7% (100 suns) were attained for 20‐µm‐thick devices. Copyright © 2012 John Wiley & Sons, Ltd.     

EL测试在光伏太阳能电池检测中的应用

为了满足客户对太阳能电池组件性能的更高要求,通过对电池片的EL测试,从来料方面进行把关,通过对层压敷设件和组件的EL测试,能够合理的控制由于工艺参数设置不当和人为因素引起的组件不良缺陷,从而能够将问题消灭在组件出厂之前,保证组件质量。同时,通过分析EL图像,也有助于完善和改进电池片以及组件的生产工艺,对太阳能电池的生产有重要指导意义。     

高效硅基异质结太阳能电池的模拟

a-Si:H/c-Si异质结太阳能电池的基本参数,如层厚度、掺杂浓度、a-Si:H/c-Si界面缺陷、功函数等是影响载流子传输特性和电池效率的关键因素。在本文中,利用AFORS-HET程序,研究了这些参数与a-Si:H/c-Si电池的性能的关联性。最后,具有TCO/n-a-Si:H/i-a-Si:H/p-c-Si/p -a-Si:H/Ag结构的太阳能电池的最优化性能被获得,其光电转换效率为27.07%（VOC: 749 mV, JSC: 42.86 mA/cm2, FF: 84.33%）。深入地了解异质结电池的输运特性,对进一步提高电池的效率有很大的帮助,同时对实际太阳能电池的制造也能提供有益的指导。     

The path to 25% silicon solar cell efficiency: History of silicon cell evolution

The first silicon solar cell was reported in 1941 and had less than 1% energy conversion efficiency compared to the 25% efficiency milestone reported in this paper. Standardisation of past measurements shows there has been a 57% improvement between confirmed results in 1983 and the present result. The features of the cell structure responsible for the most recent performance increase are described and the history of crystalline and multicrystalline silicon cell efficiency evolution is documented. Copyright © 2009 John Wiley & Sons, Ltd.     

Numerical analysis of J–V characteristics of a polymer solar cell

A numerical method to determine the cell parameters from the analysis of the J–V characteristics of a polymer solar cell is proposed. This method uses the equations given by the diode model, experimental data from the literature, and an adequate fitting procedure with seven fit parameters. Different aspects of the obtained results are discussed. Information concerning cell design optimization is also obtained. The method is of general application in the field of polymer solar cells, as well as to any kind of diode‐like cell. Copyright © 2010 John Wiley & Sons, Ltd.     

Large area perovskite solar cell module

The recent dramatic rise in power conversion efficiencies (PCE) of perovskite solar cells has triggered intense research worldwide. However, their practical development is hampered by poor stability and low PCE values with large areas devices. Here, we developed a gas-pumping method to avoid pinholes and eliminate local structural defects over large areas of perovskite film, even for 5×5 cm² modules, the PCE reached 10.6% and no significant degradation was found after 140 days of outdoor testing. Our approach enables the realization of high performance large-area PSCs for practical application.