晶体硅太阳能电池的光伏特性研究

太阳能光伏技术是把太阳的光能转换成电能的主要方式。目前主要的太阳能光伏转换器件有硅太阳能电池,砷化镓太阳电池,燃料敏华太阳电池和薄膜太阳电池等。其中,硅太阳电池是主要技术。对光伏电池输出特性进行深入广泛的研究具有重要意义。在分析太阳能光伏发电的基本原理基础上,研究了太阳能电池的I-V特性、照度特性,然后对光伏实验系统进行了相关的测试。     

基于钙钛矿材料的新型结构太阳能电池器件

基于钙钛矿材料的太阳能电池是一种受到广泛关注的新型太阳能电池。根据钙钛矿太阳能电池结构的不同将其分为四类,综述了钙钛矿太阳能电池的研究现状和最新进展。详细介绍了各类钙钛矿太阳能电池的结构和性能,分析总结了其优缺点。最后展望了钙钛矿太阳能电池未来的发展趋势。     

Innovalight硅墨太阳能电池转换效率达19％

硅墨高效太阳能材料和技术营销商Innovalight,Inc．宣布该公司硅墨工艺太阳能电池的转换效率创下了19％的纪录。太阳能电池的转换效率即电池转换成电能的太阳能比例。     

利用2450型触摸屏数字源表,实现太阳能电池Ⅰ-Ⅴ特性分析

正1概述太阳能电池或光伏(PV)电池是从光源中吸收光子然后释放电子的器件,当太阳能电池与负载相连时,可以引起电流流动。太阳电池研究人员和制造商努力实现尽可能高的效率,同时损失最小。因此,太阳能电池与光伏材料的电气特性成为研究开发和制造过程中的一部分。对太阳能电池进行电流-电压(I-V)特性分析对推导有关其性能的重要参数     

量子点太阳能电池研发动态

量子点太阳能电池被称为最新的第三代太阳能光伏电池。介绍了量子点太阳能电池的技术优势及工作机理。概述了国内外量子点太阳能电池材料的研发动态。     

Cu_2ZnSn(S,Se)_4薄膜太阳能电池的研究进展

锌黄锡矿结构的Cu_2Zn Sn(S,Se)_4(CZTSSe)材料,由于具有价格低廉、带隙合适、吸光系数高等优良光电性能,很适合作为新一代无机薄膜太阳能电池的吸光层材料,已受到各国科研人员的高度关注。国内外采用多种沉积薄膜技术来制备CZTSSe吸光层材料,主要包括真空和非真空方法。综述了最近CZTSSe太阳能电池制备技术所取得的一些进展,尤其对采用溶液法制备CZTSSe太阳能电池的发展现状做了重点阐述。展望了CZTSSe太阳能电池的发展趋势。     

纳米结构太阳电池的研究与展望

纳米结构太阳电池在未来第三代太阳电池中具有潜在应用价值。首先,介绍了各种纳米结构光伏材料的优异物理特性。然后,着重评述了不同纳米结构太阳电池近年的研究进展。这些太阳电池包括具有带隙可调谐特性的量子阱太阳电池、具有良好光吸收特性的纳米薄膜太阳电池、具有低反射率特性的纳米线太阳电池和基于多基子产生效应的量子点太阳电池。最后,提出了发展纳米结构太阳电池的若干技术对策,包括合理选择适宜纳米结构的材料、制备高质量的纳米光伏材料、优化设计太阳电池的组态结构以及揭示与阐明太阳电池中光生载流子的输运机制。     

江苏无锡新区将成为全球最大光伏产业基地

无锡光伏产业园奠基。该产业园将围绕太阳能电池制造设备、材料及辅助材料、太阳电池及元件、太阳能光伏应用产品及工程等产业链的各个环节,开展高端配套服务业,辐副和带动全国上下游光伏产业实现联动发展。目前已经有两个大型项目明确入驻光伏产业园,分别为昌盛光伏科技（中国）有限公司的太阳电池及组件项目,以及留美博士挂帅的创业团队的等离子体膜膜太阳能电池项目。     

晶体硅太阳电池的应用及发展

随着全球气候变暖、污染问题日益严重,从传统能源向可再生能源的转变势在必行。其中太阳能作为可再生能源的重要部分,最近几年已经得到了很广泛的应用。晶体硅太阳能电池是目前多种太阳能电池中技术最为成熟、光电转换效率最高、应用最为广泛的一种,目前国外单晶硅太阳能电池实验室转换效率最高已达到24.7%,多晶硅太阳能电池达到19.8%。本文就晶体硅太阳电池的应用及发展做一简要介绍。     

太阳能利用技术上的突破：与电力价效比相当

美国制定了太阳能发电制造技术发展规划(PVMaT),该项计划由美国能源部拨款,由国家可重新利用能源实验室(NREL)具体实施。现在,太阳能发电制造技术研究的目标是如何降低太阳能发电的成本。最近报道的太阳能电池效率有新突破,太阳能电池每瓦的成本与电每瓦的成本相当。世界上很多国家都在研究太阳发电技术问题,因为太阳能发电可以用不同的途径实现。太阳能电池基本上采用p—n结光电二极管。本文主要介绍太阳能电池工业生产技术。美国有5个较大的太阳能电池制造商,其中4个制造商参与了PVMaT。还有8个较小的制     

Bottom-contact passivation for high-performance perovskite solar cells using TaCl5-doped SnO2 as electron-transporting layer

Organic-inorganic hybrid perovskite solar cells (PSCs) possess the promising potential to substitute photovoltaic technologies in the traditional model. The modified SnO₂ as an electron-transporting layer (ETL) has been studied extensively because of its excellent properties. Herein, we implemented the TaCl₅ doped SnO₂ ETL in the n-i-p structure perovskite solar cells. The doped SnO₂ solution was demonstrated the characterization of neutral power of value and hydrophobicity. The conduction band of changed ETLs shifted downward by 0.26 eV resulting in the efficient electron transfer. Furthermore, the doped SnO₂ films affect the perovskite crystallite size with passivated traps and reduced nonradiative recombination loss. After employing TaCl₅-doped SnO₂ ETL, the open-circuit voltage enhances from 0.97 to 1.08 V and a united power conversion efficiency increases from 16.38% to 18.23% achieved when adopted 1.0 wt% doped TaCl₅–SnO₂ TEL. The developed doping method provides an effective method to passivate SnO₂ for fabricating high-performance perovskite solar cells.     

High‐efficiency Sb2S3‐based hybrid solar cell at low light intensity: cell made of synthesized Cu and Se‐doped Sb2S3

Cu‐doped (as p‐doped) and Se‐doped (as n‐doped) Sb₂S₃ were synthesized from undoped Sb₂S₃ using a newly developed technique, simple colloidal synthesis method. X‐ray diffraction measurements detected no peaks related to any of the Cu and Se compounds in Cu and Se‐doped samples. Energy dispersive X‐ray analysis, however, confirmed the presence of Cu and Se ions in the doped samples. Diffuse reflectance spectroscopy revealed the optical band gap energy changes because of doping effect, as reported for both the p‐type and the n‐type material. The valence‐band X‐ray photoelectron spectroscopy data showed a significant shift in the valence band to higher (Se‐doped; +0.53 eV) and a shift to lower (Cu‐doped; −0.41 eV) binding energy, respectively, when compared with the undoped sample. We report here on an inexpensive solar cell designed and made entirely of a synthesized material (indium tin oxide/p‐doped Sb₂S₃ + polyaniline (PANI)/amorphous/undoped Sb₂S₃ + PANI/n‐doped Sb₂S₃ + PANI/PANI/electrolyte (0.5 M KI + 0.05 M I₂)/Al). The cell has a high efficiency of 8% to 9% at a very low light intensity of only 5% sun, which makes it particularly suitable for indoor applications. As found, the cell performance at the intensity of 5% sun is governed by high shunt resistance (R_SH) only, which satisfies standard testing conditions. At higher light intensities (25% sun), however, the cell exhibits lower but not insignificant efficiency (around 2%) governed by both the series (R_S) and the R_SH. Minimal permeability in the UV region (up to 375 nm) and its almost constant value in the visible and the NIR region at low light intensity of 5% sun could be the reasons for higher cell efficiency. Copyright © 2015 John Wiley & Sons, Ltd.     

ZnSe制备技术研究进展

ZnSe是一种很有应用前景的半导体光电材料,得到了广泛的关注,制备高质量的ZnSe已成为光电 技术领域重要的研究课题之一.本文详细叙述了近年来ZnSe的各种制备技术的研究进展及其特点.     

Boosting the performance and stability of perovskite solar cells with phthalocyanine-based dopant-free hole transporting materials through core metal and peripheral groups engineering

Three novel dopant-free hole-transporting materials (HTMs) based on phthalocyanine core containing (4-methyl formate) phenoxy or (4-butyl formate) phenoxy as the peripheral groups with cupper or zinc as the core metals (CuPcNO₂-OMFPh, CuPcNO₂-OBFPh, ZnPcNO₂-OBFPh) were designed and synthesized. All of the phthalocyanine complexes show excellent thermal stabilities, appropriate energy levels and suitable hole mobilities. The potential of three HTMs were tested in perovskite solar cells (PSCs) and ZnPcNO₂-OBFPh based PSC obtained power conversion efficiency (PCE) of 15.74% under 100 mA cm⁻² standard AM 1.5G solar illumination. Most important of all, PSC based on ZnPcNO₂-OBFPh shows better stability than that of the other two phthalocyanines and Spiro-OMeTAD under continuous light irradiation at 60 °C and maximum power point tracking in ambient air without encapsulation after 500 h. The results show that the introduction of appropriate peripheral groups and core metals can improve the performance and stability of PSCs dramatically, which provides an alternative way to develop HTMs for efficient and stable PSCs.     

Fabrication of a counter electrode using glucose as carbon material for dye sensitized solar cells

Carbon material was produced from the graphitization of glucose at high temperature in flowing argon. The produced carbon material was characterized using Scanning electron microscopy, Transmission electron microscopy, Raman spectroscopy and XRD. Carbon slurry of the produced carbon was made in ethanol by using polyvinylpyrrolidone (PVP) as surfactant. Carbon slurry was coated homogeneously on fluorine doped tin oxide (FTO) glass by a doctor blade technique and applied as counter electrode for dye synthesized solar cell. The current density (J) and open circuit voltage (V_OC) of fabricated cell was 8.30 mA cm⁻² and 0.77 V respectively. The efficiency of the cell was 3.63%, which is comparable to 5.82% of cell with platinum counter electrode under the same experimental conditions.     

N-phenylindole-diketopyrrolopyrrole-containing narrow band-gap materials for dopant-free hole transporting layer of perovskite solar cell

Novel conjugated materials, DPIO and DPIE, having same molecular configuration of both an electron donating N-phenylindole and an electron accepting diketopyrrolopyrrole derivative, exhibited different aggregation behavior because of the applied side chains. When DPIO and DPIE were applied to as hole transporting materials in perovskite solar cell, DPIO showed better device performance than ones with DPIE, mostly due to the aggregation-assisted enhanced electrical property. DPIO effectively extracted hole from the perovskite layer, providing over 10% PCE of cell efficiency without any chemical doping. Incident-photon-to-electron conversion efficiency (IPCE) measurement confirmed that DPIO’s strong absorption in the longer wavelength region partly contributed to the light harvesting of the solar cell device. In addition, time-resolved photoluminescence (TRPL) and transient photovoltage (TPV) studies proved that the DPIO-based device, compared to the conventional Spiro-MeOTAD-based device, has better charge extraction ability and reduced charge recombination.     

Phenylhydrazinium Iodide for Surface Passivation and Defects Suppression in Perovskite Solar Cells

In recent years, hybrid perovskite solar cells (HPSCs) have received considerable research attention due to their impressive photovoltaic performance and low‐temperature solution processing capability. However, there remain challenges related to defect passivation and enhancing the charge carrier dynamics of the perovskites, to further increase the power conversion efficiency of HPSCs. In this work, the use of a novel material, phenylhydrazinium iodide (PHAI), as an additive in MAPbI₃ perovskite for defect minimization and enhancement of the charge carrier dynamics of inverted HPSCs is reported. Incorporation of the PHAI in perovskite precursor solution facilitates controlled crystallization, higher carrier lifetime, as well as less recombination. In addition, PHAI additive treated HPSCs exhibit lower density of filled trap states (10¹⁰ cm^?2) in perovskite grain boundaries, higher charge carrier mobility (≈11 × 10^?4 cm² V^?1 s), and enhanced power conversion efficiency (≈18%) that corresponds to a ≈20% improvement in comparison to the pristine devices.     

Hole‐Transporting Materials Incorporating Carbazole into Spiro‐Core for Highly Efficient Perovskite Solar Cells

Hole‐transporting materials (HTMs) play a significant role in hole transport and extraction for perovskite solar cells (PeSCs). As an important type of HTMs, the spiro‐architecture‐based material is widely used as small organic HTM in PeSCs with good photovoltaic performances. The skeletal modification of spiro‐based HTMs is a critical way of modifying energy level and hole mobility. Thus, many spiro alternatives are developed to optimize the spiro‐type HTMs. Herein, a novel carbazole‐based single‐spiro‐HTM named SCZF‐5 is designed and prepared for efficient PeSCs. In addition, another single‐spiro HTM SAF‐5 with reported 10‐phenyl‐10H‐spiro[acridine‐9,9′‐fluorene] (SAF) core is also synthesized for comparison. Through varying from SAF core to SCZF core as well as comparing with the classic 9,9′‐spiro‐bifluorene, it is found that the new HTM SCZF‐5 exhibits more impressive power conversion efficiency (PCE) of 20.10% than SAF‐5 (13.93%) and the commercial HTM spiro‐OMeTAD (19.11%). On the other hand, the SCZF‐5‐based device also has better durability in lifetime testing, indicating the newly designed SCZF by integrating carbazole into the spiro concept has good potential for developing effective HTMs.     

F4TCNQ-doped DEPT-SC as hole transporting material for stable perovskite solar cells

The CH₃NH₃PbI₃-based perovskite solar cells using α, α′-diethoxyethyl-oligothiophenes (DEPT-SC) doped with 2,3,5,6-Tetrafluoro-7,7,8,8-tetracyanoquino-dimethane (F4TCNQ) as hole transport material (HTM) exhibited a power conversion efficiency of 11.52%. Compared to the pristine devices, the perovskite solar cells using the new synthesized HTM showed an increased efficiency by about 18% and exhibited better photo-stability, indicating that the organic dopant is an effective method for DEPT-SC toward stable perovskite solar cells.