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Electrodeposited MoS2 counter electrode for flexible dye sensitized solar cell module with ionic liquid assisted photoelectrode
摘要： Dye-sensitized solar cell (DSSC) offers great advantages includes low cost materials, economic fabrication, suitable for low-light conversion, flexibility option, color design possibilities, etc. In the present study, a semi-transparent, molybdenum disulphide (MoS2) flexible counter electrode (CE) is realized through electrodeposition method. Low temperature processed TiO2 solution is used for photoelectrode (PE) preparation. Conductive ionic liquid (BVImI + LiI) is used to modify the surface of photoelectrode for alteration of conduction band level of PE, towards enriched electron injection rate into TiO2. Flexible dye-sensitized solar cell (f-DSSC) fabricated by sandwich the photoelectrode and counter electrodes, and an ionic liquid electrolyte is injected. The surface modified photoelectrode (SM-PE) assisted test cell (0.16 cm2 active area) witnessed an enhanced current density value 12.46 mA/cm2 and power conversion efficiency (PCE) 4.84% is higher than the normal PE based f-DSSC (11.56 mA/cm2 and 4.35%). For comparison, platinum-based f-DSSC with SM-PE is fabricated, is attained 6.08% of PCE. The f-DSSC sub-module with MoS2-CE gave 4.21% of PCE, the results are presented.
关键词： Surface modification of PE,Imidazolium iodide,Flexible DSSC,Semi-transparent flexible DSSC module,MoS2 counter electrode
更新于2025-09-23 15:19:57
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A transparent and Pt-free all-carbon nanocomposite counter electrode catalyst for efficient dye sensitized solar cells
摘要： Recently, substantial focus has made in the development of cost effective Pt-free dye sensitized solar cells (DSSCs). In this article we report a potential, Pt-free, carbon based nanocomposite as counter electrode catalyst for dye sensitized solar cells. Graphene oxide (GO) was made into reduced graphene oxide (SSrGO) by irradiating with light (Xe source). Suspension of SSrGO in DMF was spray coated onto fluorine doped tin oxide (FTO) coated glass substrate, followed by spray coat of single walled carbon nanohorns (SWCNH) suspension in DMF. SSrGO and SWCNH coated FTO glass substrate was investigated as an effective Pt-free composite counter electrode (CE) for DSSC and also showed the comparable catalytic activity with Pt. The test cell reveals power conversion efficiency (PCE) of 8.27%, whereas the DSSC module exhibited a PCE of 5.18%. By using the fabricated DSSC module, an electric motor (15 mW) was operated both in indoor and outdoor light conditions. The procedures followed in this work pave a way for the easy fabrication of composite CE towards transparent DSSC modules and further the integration of the DSSC module with the standard Si solar cell is of great potential for various real-time application.
关键词： Reduced graphene oxide,Dye sensitized solar cell,Cost effective composite counter electrode,SWCNH,Transparent DSSC module
更新于2025-09-19 17:13:59
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Performance of 7-cells Dye Sensitized Solar Module in Z-type Series Interconnection
摘要： Dye sensitized solar cells (DSSC) is becoming attractive research topic as third generation solar cells technology since it provides clean energy and low cost fabrication. In this study, DSSC was fabricated into module scale, which is important for practical applications. The module was prepared in sandwich structure consisting of TiO2 working electrode and Pt counter electrode on conductive substrate with an area of 100 mm x 100 mm, which was distributed into seven active cells. TiO2 paste was deposited on FTO glass as working electrode with a size of 10 mm x 98 mm per unit cell by screen printing method. Each cell was connected in Z-type series that able to produce high voltage. ?? ? ?? measurement was applied in two methods consisting of laboratory testing using sun simulator under 500 W/m2 of illumination and outdoor testing using a digital multimeter under direct sunlight. The result shows that DSSC module has photoconversion efficiency of 1.08% and 1.17% for laboratory and outdoor testing, respectively. The module was also tested in three different times to monitor its stability performance.
关键词： Z-type series interconnection,Dye sensitized solar cells,stability performance,photoconversion efficiency,DSSC module
更新于2025-09-09 09:28:46