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1.
染料敏化纳米晶太阳能电池   总被引:28,自引:0,他引:28  
半导体纳米晶颗粒形成的膜具有非常大的比表面积,其表面上可以吸附大量的染料分子,因而可以有效地吸收太阳光,并将其转化为电能。本文介绍了染料敏化纳米晶太阳能电池的基本原理以及电池的结构。从电池各个组成部分分别介绍了染料敏化纳米晶太阳能电池的发展及其研究现状。  相似文献   

2.
染料敏化纳米晶太阳能电池中敏化剂的研究进展   总被引:5,自引:0,他引:5  
染料敏化剂是染料敏化纳米晶太阳能电池(DSSC)的重要组成部分,对电池性能有着重要的影响。本文将染料敏化剂分为有机金属配合物和纯有机化合物两大类,综述了这两类敏化剂的研究现状,同时讨论了其结构对光电转化效率的影响机理。  相似文献   

3.
染料敏化纳米薄膜太阳电池中的染料敏化剂   总被引:5,自引:0,他引:5  
简要介绍了化学太阳电池的原理和染料敏化剂的发展历史,将现有染料敏化纳米薄膜太阳电池(简称DSCs)中的染料敏化剂分为有机和无机两大类,详细介绍了其中的羧酸多吡啶钌、膦酸多吡啶钌、多核联吡啶钌染料和有机染料的研究进展;介绍了其它染料敏化剂和多种染料协同敏化的研究现状;评述了染料敏化剂在染料敏化纳米薄膜太阳电池中应用的研究进展。  相似文献   

4.
在染料敏化太阳电池中,染料敏化剂分成无机染料与有机染料两大类。无机染料受稀有金属钌的制约而成本较高,开发有机染料是降低染料敏化太阳电池成本的有效手段,成为目前研究的热点。本文从有机染料敏化剂的分子设计入手,简述了染料敏化太阳电池中有机染料敏化剂的基本结构,将有机染料敏化剂分为吲哚啉类染料、香豆素类染料、三苯胺类染料、菁...  相似文献   

5.
本文介绍了染料敏化纳米太阳能电池的结构和原理 ,对纳米TiO2 膜、敏化染料、空穴传输材料的研究进展进行了综述 .  相似文献   

6.
本文合成了含3种不同取代基的噻吩-三苯胺染料敏化剂(H1,H2和H3),并将其应用于二氧化钛纳米晶染料敏化太阳能电池.系统地研究了3种染料的光物理、电化学和光伏性能.基于H1的染料敏化太阳能电池获得了9.10%的光电转换效率(Voc=0.72V,Jsc=18.03mAcm-2,FF=0.70).  相似文献   

7.
本文报道了水热法可控合成二氧化钛纳米晶及其在染料敏化太阳能电池中的应用.选择合适的有机碱胶化剂,能很好地控制二氧化钛纳米晶的生长,形成不同形貌和粒径的锐钛矿型二氧化钛纳米晶颗粒.染料敏化太阳能电池光电性能测试结果表明,以四乙基氢氧化铵为胶化剂合成的边长为8~13nm的正方形二氧化钛纳米晶构成的光阳极光电性能优于以四丁基氢氧化铵为胶化剂合成的边长为7~10nm的正方形二氧化钛纳米晶以及长18~35nm,宽10~18nm的长方形二氧化钛纳米晶构成的光阳极.用较高浓度的四甲基氢氧化铵胶化剂能合成球形或椭球形亚微米级二氧化钛颗粒,以其为散射中心在光阳极中构建散射层,染料敏化太阳能电池的光电转换效率能由6.77%提高到8.18%.  相似文献   

8.
<正>染料敏化纳米晶二氧化钛太阳能电池制备简单、成本低、光电转换效率高,已成为当前光电转换器件研究的热点之一.但目前还有许多制约染料敏化太阳能电池光电转换效率的问题有待解决.基于目前染料敏化太阳能电池在长波区采光不足的问题,本论文深入研究了在红光区域具有强吸光能力的方酸类染料在染料敏化太阳能电池中的应用,重点考察了方酸染料的结构对其光电转换性质的影响,并开辟了一种协同敏化新技术,还利用方酸染料的β-环糊精包合物实现了水溶液中氰根离子的高选择性检测.具体研究结果如下:  相似文献   

9.
对电极是染料敏化太阳能电池的重要组成部分,改进对电极是提高其能量转换效率及降低成本的有效手段之一.本文重点综述了2008年以来染料敏化太阳能电池对电极的研究成果,详细介绍了各类对电极包括金属Pt、Au、Ni,纳米炭材料和导电聚合物等对电极的优点和制备工艺.Pt对电极性能最好,但是高成本限制了它在染料敏化太阳能电池产业化中的应用;新型的价格低廉、活性较高的纳米炭材料和导电聚合物及其复合材料等对电极在染料敏化太阳能电池的研究中逐渐引起人们的重视.  相似文献   

10.
染料敏化太阳能电池是太阳能电池的重要发展方向之一,染料敏化剂是影响电池光电转换效率的重要组分,也一直是太阳能电池材料的研究热点.经过20多年的研究,现已开发的光敏染料主要有金属配合物染料和纯有机染料两大类.本文依据染料结构特征,将金属配合物染料分为钌的多吡啶配合物、其它金属(如Os、Pt)的多吡啶配合物、卟啉及酞菁类配...  相似文献   

11.
Structural Chemistry - A new series of triphenylamine (TPA)-based organic dyes (A1-A4) are characterized and implemented as photosensitizers for dye-sensitized solar cells (DSSCs). In the...  相似文献   

12.
Nanoporous-walled tungsten oxide (WO(3)) nanotubes (NTs), which had a more positive conduction band edge level compared to that of TiO(2), were applied to various organic dyes for dye-sensitized solar cells (DSSCs). The dye-sensitized WO(3) NTs displayed photosensitization for the organic dyes whose lowest unoccupied molecular orbital (LUMO) level was relatively positive to the conventional TiO(2) electrode and, thus, not applicable for electron injection to the TiO(2) electrode. Electron transport time and electron lifetime for the WO(3) electrode in the DSSCs were investigated. In comparison to the DSSCs based on TiO(2), SnO(2), and In(2)O(3), the WO(3) DSSCs displayed the longest lifetime. On the other hand, non-diffusion-like electron transport may be an issue to apply WO(3) for the DSSCs.  相似文献   

13.
We report here the synthesis and electrochemical and photophysical properties of a series of easily prepared dipolar organic dyes and their application in dye-sensitized solar cells (DSSCs). For the six organic dyes, the molecular structures comprised a triphenylamine group as an electron donor, a cyanoacrylic acid as an electron acceptor, and an electron-deficient diphenylquinoxaline moiety integrated in the π-conjugated spacer between the electron donor and acceptor moieties. The incorporation of the electron-deficient diphenylquinoxaline moiety effectively reduces the energy gap of the dyes and broadly extends the spectral coverage. DSSCs based on dye 6 produced the best overall cell performance of 7.35?%, which translates to approximately 79?% of the intrinsic efficiency of the DSSCs based on the standard N719 dye under identical experimental conditions. The high performance of DSSCs based on dye 6 among the six dyes explored is attributed to the combined effects of high dye loading on a TiO(2) surface, rapid dye regeneration, and effective retardation of charge recombination.  相似文献   

14.
In principle, conjugated polymers can work as electron donors and thus as low-cost p-type organic semiconductors to transport holes in photovoltaic devices. With the booming interests in high-efficiency and low-cost solar cells to tackle global climate change and energy shortage, hole transporting materials(HTMs) based on conjugated polymers have received increasing attention in the past decade. In this perspective, recent advances in HTMs for a range of photovoltaic devices including dye-sensitized solar cells(DSSCs), perovskite solar cells(PSCs),and silicon(Si)/organic heterojunction solar cells(HSCs) are summarized and perspectives on their future development are also presented.  相似文献   

15.
Organic dyes with a D-π-A structure have drawn increasing attention as sensitizers in dye-sensitized solar cells (DSSCs), due to their rich photophysical properties, easy molecular tailoring, and low-cost production. This review mainly focuses on the relationship between dye structure and photovoltaic properties for organic dyes containing cyanoacrylic acid as both an anchor and an acceptor. This review also introduces different donors and π-conjugation units as building blocks for sensitizer synthesis.  相似文献   

16.
In this review, the introduction of solar cells is presented. Old and new generation solar cells are briefly described. Quantum dot solar cells (QDSCs), perovskite solar cells, and dye-sensitized solar cells (DSSCs) are concisely introduced. The sensitization mechanism in DSSCs is discussed in detail concerning the spectral and electron injection properties of different dyes. An analysis of the intramolecular charge transfer process in the excited dye molecule is also provided. The use of porphyrin-based dyes as sensitizers in DSSCs is then reviewed. The design, synthesis, and photovoltaic application of a wide variety of porphyrin-based dyes as well as porphyrin dyads are presented and discussed. Theoretical studies of the spectral and electronic properties of different porphyrin-based dyes using DFT and TD-DFT methods are described. The different possibilities for improving the light-to-electrical energy conversion performance are discussed, such as structural modifications through introducing push-pull moieties, which in turn tunes the HOMO-LUMO energy gap of the sensitizing dye used in the DSSC. Experimental, as well as theoretical calculations of adsorption energies of the sensitizing dyes, are crucial for predicting the relative performance and efficiency of the dyes.  相似文献   

17.
Alkyl-functionalized organic dyes for efficient molecular photovoltaics   总被引:1,自引:0,他引:1  
We designed and synthesized new alkyl-functionalized organic dyes, MK-1 and MK-2, for dye-sensitized solar cells (DSSCs). Based on the MK-2 dye, a high performance of efficiency (eta, 7.7%; short-circuit current density Jsc = 14.0 mA cm-2, open-circuit voltage Voc = 0.74 V, and fill factor FF = 0.74) was achieved under AM 1.5 G irradiation (100 mW cm-2). Remarkably, the relatively higher Voc for DSSCs based on MK-1 and MK-2 dyes, which have long alkyl chains, were observed among the organic dyes caused by the increasing of the electron lifetime in the conduction band of TiO2. Our molecular design of alkyl-functionalized dyes strongly suggests the promising performance of molecular photovoltaics based on organic dyes.  相似文献   

18.
采用密度泛函理论和含时密度泛函理论方法计算了2个吩噻嗪类染料及其吸附到TiO2上后分子的基态和激发态光物理性质与热力学参数.结果表明,电子给体的改变虽未明显改变染料的光谱性质(垂直跃迁能和振子强度),但可以改变分子的前线轨道能级,进而影响染料分子的激子结合能Eb及激发态电子注入到半导体TiO2中的驱动力△Gint的大小...  相似文献   

19.
A series of organic dyes with a donor–acceptor–acceptor (D–A–A) configuration, in which various diarylthienylamine donors and a cyanoacrylic acid acceptor are bridged by a low-band-gap 2,1,3-benzothiadiazole acceptor, have been synthesized, characterized, and employed as photosensitizers for dye-sensitized solar cells (DSSCs). The adoption of 2,1,3-benzothiadiazole as the bridging acceptor endowed these tailor-made dyes with superior light-harvesting capabilities in comparison to their previously reported pyrimidine-based analogs. After fine-tuning the fabrication conditions, DSSCs based on these dyes showed solar spectral responses extending to the near-IR region and achieved power conversion efficiencies (PCEs) of up to 3.16% (OHexDPTB) under simulated AM 1.5G irradiation (100 mW cm?2).  相似文献   

20.
The structural, electronic and optical features of two metal-free triphenylamine (TPA) organic dyes (namely C206 and C217) before and after binding to a TiO(2) anatase nanoparticle have been investigated in detail, as a model for the corresponding dye-sensitized solar cells (DSSCs). The combination of density functional tight-binding (DFTB), density functional theory (DFT), and time-dependent DFT (TDDFT) approaches are employed. To understand the effects of the linker part in the TPA organic dyes on the energy conversion efficiency of the DSSCs, C217 and C206, which share the same donor and anchor parts but different linker parts, are theoretically evaluated. Our results show that compared with C206 containing just one thienothiophene unit as the linker, for C217 the introduction of one electron-rich 3,4-ethylenedioxythiophene group to the linker part results in stronger couplings with the TiO(2) conduction band and more efficient electron transfer. This difference contributes to the higher efficiency of C217 in DSSCs experiments. This study is expected to assist the molecular design of new and more efficient TPA-based organic dyes for the optimization of the DSSCs.  相似文献   

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