A series of new organic sensitisers for dye-sensitised solar cells

2016 ◽  
Vol 45 (4) ◽  
pp. 234-239 ◽  
Author(s):  
Mozhgan Hosseinnezhad
Keyword(s):  
Solar Cells ◽  
Conversion Efficiency ◽  
High Efficiency ◽  
Organic Dyes ◽  
Low Cost ◽  
Analytical Techniques ◽  
Content Type ◽  
Acceptor Group ◽  
Maximum Conversion Efficiency ◽  
First Time

Purpose Dye-sensitised solar cells (DSSCs) have attracted a great deal of interest. Dye molecules are key materials in DSSCs that produce electrons. This study reports on synthesis of the organic dyes and investigation their performance in DSSCs. Design/methodology/approach A series of new organic dyes were prepared using double rhodanine as the fundamental electron-acceptor group and aldehydes with varying substituents as the electron-donor groups. These dyes were first purified and then characterised by analytical techniques. DSSCs were fabricated to determine the photovoltaic behaviour and conversion efficiency of each individual dye. Findings Results demonstrated that all the dyes form j-type aggregates on the nano TiO2. All dyes in DSSC structure show suitable power conversion efficiency, and Dye 5 due to presence of OCH3 and OiPr presents maximum conversion efficiency. Practical implications In the search for high-efficiency organic dyes for DSSCs, development of new materials offering optimised photochemical stabilities as well as suitable optical and electrical properties is importance. Social implications Organic dyes as photosensitisers are interesting due to low cost, relatively facile dye synthesis and capability of easy molecular tailoring. Originality/value A series of new organic metal-free dyes were prepared as sensitisers for DSSCs for the first time.

Effect of substituents moiety in organic sensitiser based on carbazole on the performance of nanostructure dye-sensitised solar cells

2015 ◽  
Vol 44 (5) ◽  
pp. 292-299 ◽  
Author(s):  
Kamaladin Gharanjig ◽  
Mozhgan Hosseinnezhad
Keyword(s):  
Solar Cells ◽  
Conversion Efficiency ◽  
High Performance ◽  
Organic Dyes ◽  
Low Cost ◽  
Analytical Techniques ◽  
Oxidation Potential ◽  
Photovoltaic Properties ◽  
Content Type ◽  
Cyanoacrylic Acid

Purpose – The purpose of this paper is to prepare new organic dyes and use them as sensitisers in dye-sensitised solar cells. These dyes were synthesised and purified and then characterised by analytical techniques. Spectrophotometric evaluations of the prepared dyes were carried out in solution and on a nano-anatase TiO2 substrate to assess the possible changes in the status of the dyes in different environments. Finally, the photovoltaic properties were investigated in dye-sensitised solar cells. Design/methodology/approach – So as to synthesise dyes, N-substituents carbazole were utilised as the fundamental electron donor group and cyanoacrylic acid or acrylic acid as electron acceptor anchoring groups. Purified dyes were dissolved in solution and coated on TiO2 substrate. Finally, dye-sensitised solar cells were fabricated to determine the photovoltaic behaviour and conversion efficiency of each individual dye. Findings – The results showed that the dyes form j-type aggregates on the nano TiO2. The oxidation potential of synthesised carbazole dyes is > 0.2 V vs Fc/Fc+; hence, their high performance in dye-sensitised solar cells. Dye 3 exhibited 2.11 per cent of conversion efficiency in comparison to 2.89 per cent for the identical cells with Dye 9 containing cyanoacrylic acid which acted as the best acceptor group. Practical implications – The novel dyes look as promising as highly light fast, efficient dyes for dye-sensitised solar cells. Social implications – Organic dye provides low cost and less hazardous materials for dye-sensitised solar cells. Originality/value – A series of new organic dyes were synthesised as sensitisers for dye-sensitised solar cells for the first time.

Investigation of photovoltaic properties of nanostructure indoline dye-sensitised solar cells using changes in assembling materials

2017 ◽  
Vol 46 (5) ◽  
pp. 393-398 ◽  
Author(s):  
Mozhgan Hosseinnezhad ◽  
Kamaladin Gharanjig
Keyword(s):  
Solar Cells ◽  
Organic Dyes ◽  
Low Cost ◽  
Photovoltaic Performance ◽  
Ammonium Iodide ◽  
Photovoltaic Properties ◽  
Content Type ◽  
Tetrabutyl Ammonium Iodide ◽  
Tetrabutyl Ammonium ◽  
First Time

Purpose The purpose of this paper is to study assembling parameters in dye-sensitised solar cells (DSSCs) performance. For this end, 3a,7a-dihydroxy-5ß-cholanic acid (cheno) are selected as anti-aggregation agent and two solutions, namely, tetrabutyl ammonium iodide and (PMII)IL used as electrolyte. Design/methodology/approach A series of organic dyes were selected using N-substituents carbazole as electron donor group and acrylic acid and cyanoacrylic acid as electron acceptor groups. Absorption properties of purified dyes were studied in solution and on photoelectrode substrate. DSSCs were prepared in the presence of anti-aggregation agent and different electrolyte to determine the photovoltaic performance of each dyes. Findings The results showed that all organic dyes form J-aggregation on the photoanode substrate in the absence of anti-aggregation agent and the amounts of aggregation were reduced in the presence of anti-aggregation agent. DSSCs were fabricated in the presence of anti-aggregation agent. The photovoltaic properties were improved using tetrabutyl ammonium iodide as electrolyte. The maximum power conversion efficiency was achieved for D12 in the presence of cheno and tetrabutyl ammonium iodide as anti-aggregation agent and electrolyte, respectively. Social implications Organic dye attracts more and more attention due to low cost, facile route synthesis and less hazardous. Originality/value The effect of anti-aggregation agent and electrolyte on DSSCs performance was investigated for the first time.

Antimony trifluoride incorporated SnO2 for high-efficiency planar perovskite solar cells

2021 ◽  
Author(s):  
Li Zhang ◽  
Hui Li ◽  
Jing Zhuang ◽  
Yigang Luan ◽  
Sixuan Wu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Electron Transport ◽  
Tin Dioxide ◽  
High Efficiency ◽  
Low Cost ◽  
Perovskite Solar Cells ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Antimony Trifluoride ◽  
First Time

The low-cost material antimony trifluoride (SbF3) was doped into the commonly used tin dioxide (SnO2) for the first time, and the SbF3-doped SnO2 as an electron transport layer (ETL) was...

scholarly journals Solution-Processed CdTe Thin-Film Solar Cells Using ZnSe Nanocrystal as a Buffer Layer

2018 ◽  
Vol 8 (7) ◽  
pp. 1195 ◽  
Author(s):  
Yanru Chen ◽  
Xianglin Mei ◽  
Xiaolin Liu ◽  
Bin Wu ◽  
Junfeng Yang ◽  
...  
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Buffer Layer ◽  
High Efficiency ◽  
Low Cost ◽  
Buffer Layers ◽  
Thin Film Solar Cells ◽  
Solution Processed ◽  
Cdte Nanocrystal ◽  
First Time

The CdTe nanocrystal (NC) is an outstanding, low-cost photovoltaic material for highly efficient solution-processed thin-film solar cells. Currently, most CdTe NC thin-film solar cells are based on CdSe, ZnO, or CdS buffer layers. In this study, a wide bandgap and Cd-free ZnSe NC is introduced for the first time as the buffer layer for all solution-processed CdTe/ZnSe NC hetero-junction thin-film solar cells with a configuration of ITO/ZnO/ZnSe/CdTe/MoOx/Au. The dependence of the thickness of the ZnSe NC film, the annealing temperature and the chemical treatment on the performance of NC solar cells are investigated and discussed in detail. We further develop a ligand-exchanging strategy that involves 1,2-ethanedithiol (EDT) during the fabrication of ZnSe NC film. An improved power conversion efficiency (PCE) of 3.58% is obtained, which is increased by 16.6% when compared to a device without the EDT treatment. We believe that using ZnSe NC as the buffer layer holds the potential for developing high-efficiency, low cost, and stable CdTe NC-based solar cells.

High-Efficiency, Thin-Film GaAs Solar Cells

1983 ◽  
Vol 105 (3) ◽  
pp. 237-242 ◽  
Author(s):  
S. Zwerdling ◽  
K. L. Wang ◽  
Y. C. M. Yeh
Keyword(s):  
Solar Cells ◽  
Conversion Efficiency ◽  
High Efficiency ◽  
Weight Ratio ◽  
Chemical Vapor ◽  
Oxide Semiconductor ◽  
Large Area ◽  
Coated Metal ◽  
Cvd Growth ◽  
First Time

The present research is directed toward demonstrating the feasibility of producing high-efficiency GaAs solar cells with high power-to-weight ratio by organo-metallic chemical vapor deposition (OM-CVD) growth of thin epi-layers on suitable substrates. Antireflection-coated, metal-oxide-semiconductor (AMOS), GaAs solar cells grown on bulk polycrystalline Ge substrates were initially studied, with the best efficiency achieved being about 9 percent AM1 (7 percent AM0). Subsequently, a new direct deposition method for fabricating ultra-thin top layer, epitaxial n+ /p shallow homojunction solar cells on (100) GaAs substrates (without anodic thinning) was developed by means of which large area (1 cm2) cells were produced with about 19 percent AM1 (15 percent AM0) conversion efficiency. An AM1 conversion efficiency of about 18 percent (14 percent AM0), or about 17 percent (13 percent AM0) with 5 percent grid coverage, was achieved for a single-crystal, GaAs, n+ /p cell grown by OM-CVD on a Ge wafer. These achievements led to the fabrication, for the first time, of thin GaAs epi-layers OM-CVD grown with good crystallographic quality, using a (100) Si-substrate on which a thin Ge epi-interlayer was first deposited by CVD from GeH4 and processed for improved surface morphology.

scholarly journals Influence of Film Quality on Power Conversion Efficiency in Perovskite Solar Cells

Coatings ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 622 ◽  
Author(s):  
Huang ◽  
Gao ◽  
Zhang ◽  
Tian ◽  
Zhang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
High Efficiency ◽  
Low Cost ◽  
Power Conversion ◽  
Perovskite Solar Cells ◽  
Solar Cell Performance ◽  
Exciton Diffusion Length ◽  
Fabrication Procedure

Abstract: Organic-inorganic perovskite solar cells (PSCs) are a high-efficiency, low-cost form of solar technology because of the abundance of useful materials and a simple fabrication procedure relative to other photovoltaic devices. Furthermore, the perovskite material shows decent electron and hole mobilities, a wide absorption range, and long exciton diffusion length. So far, many groups have focused on the research of perovskite thin-film solar cells, and these perovskite solar cells have been deemed to be one of the leading next generation photovoltaic technologies. However, there are several problems that restrict the enhancement of perovskite solar cell performance such as their poor uniformity and low crystallinity. Herein we summarize and discuss the role of film quality on power conversion efficiency, and effect of fabrication condition on the light absorbance of perovskite film.

Numerical Simulation on Effects of TCO Work Function on Performance of a-Si:H Solar Cells

2019 ◽  
Vol 966 ◽  
pp. 501-506
Author(s):  
Ahmad Sholih ◽  
Dadan Hamdani ◽  
Sigit Tri Wicaksono ◽  
Mas Irfan P. Hidayat ◽  
Yoyok Cahyono ◽  
...  
Keyword(s):  
Solar Cells ◽  
Work Function ◽  
Conversion Efficiency ◽  
High Efficiency ◽  
Low Cost ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Conducting Oxides ◽  
Conversion Efficiencies

In this paper, we have investigated the effect of the work function of transparent conducting oxides (TCO) on the performance of a-Si:H p-i-n solar cells, including open circuit voltage (VOC), short circuit current (JSC), fill factor (FF) and conversion efficiency, using AFORS-HET software. The simulation has focused on two layers: front contact work function (ΦTCO-front) and back contact work function (ΦTCO-back) with various band from 4.7 eV to 5.3 eV and 4.2 eV to 4.9 eV respectively. From the simulation results, we know that the work function of TCO greatly affects the performance of solar cells such as Voc, Jsc, FF and conversion efficiency. By optimization, we arrive at results for Voc, Jsc, FF and conversion efficiencies of 0.88 V, 8.95 mA / cm2, 65% and 5.1% respectively. This result is obtained on ΦTCO-front 5.2 eV. When ΦTCO-front 5.2 eV, the value of VOC, FF and conversion efficiency has been saturated, while the value of the J sc actually begins to decrease. Furthermore, when the ΦTCO - back is 4.3 eV, we get the best results for VOC, Jsc, FF and conversion Efficiency of 0.9 V, 8.96 mA / cm2, 73 % and 5.9 % respectively. When ΦTCO-back 4.3 eV, the value of VOC, FF and conversion efficiency begins to decrease, while the value of the Jsc does’t change significantly. These optimizations may help in producing low cost high efficiency p-i-n solar cells experimentally.

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.

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