Phosphine-Free Heat up Synthesis of CdSe Nanocrystals for Quantum-dot-sensitized Solar Cells
نویسندگان
چکیده
We demonstrate a low cost, phosphine-free route to synthesize CdSe quantum dots (QDs) by heating the mixed precursors of Se and Cd up to 260 C. The as-synthesized CdSe QDs are characterized by using UV-visible absorption spectroscopy, high resolution transmission electron microscopy, X-ray diffractrometry, and EDX analyses. The CdSe QDsensitized TiO2 films of solar cells has been fabricated by decoration of CdSe QDs on TiO2 films deposited on FTO/glass substrate, which exhibits fill factor and photo-conversion efficiency 42.26 % and 0.95 %, respectively.
منابع مشابه
SILAR Sensitization as an Effective Method for Making Efficient Quantum Dot Sensitized Solar Cells
CdSe quantum dots were in situ deposited on various structures of TiO2 photoanode by successive ionic layer adsorption and reaction (SILAR). Various sensitized TiO2 structures were integrated as a photoanode in order to make quantum dot sensitized solar cells. High power conversion efficiency was obtained; 2.89 % (Voc=524 mV, Jsc=9.78 mA/cm2, FF=0.56) for the cells that sensitized by SILAR meth...
متن کاملEffect of PbS Film Thickness on the Performance of Colloidal Quantum Dot Solar Cells
Colloidal quantum dots offer broad tuning of semiconductor band structure via the quantum size effect. In this paper, we present a detailed investigation on the influence of the thickness of colloidal lead sulfide (PbS) nanocrystals (active layer) to the photovoltaic performance of colloidal quantum dot solar cells. The PbS nanocrystals (QDs) were synthesized in a non-coordinating solvent, 1-oc...
متن کاملRestricted charge recombination process in PbS quantum dot sensitized solar cells by different coating cycles of ZnS films
The relatively low power conversion efficiency (PCE) of quantum dot sensitized solar cells (QDSSCs) is attributed to charge recombination at the interfaces. Charge recombination process could be suppressed by coating the QD layer with a wide band gap semiconductor such as ZnS, which acts as a blocking layer between the QDs and hole transport material (HTM). In present study, to improve PCE of P...
متن کاملSynthesis of Efficiently Green Luminescent CdSe/ZnS Nanocrystals Via Microfluidic Reaction
Quantum dots with emission in the spectral region from 525 to 535 nm are of special interest for their application in green LEDs and white-light generation, where CdSe/ZnS core-shell structured nanocrystals (NCs) are among promising candidates. In this study, triple-ligand system (trioctylphosphine oxide–oleic acid–oleylamine) was designed to improve the stability of CdSe NCs during the early r...
متن کاملZnO nanoparticle based highly efficient CdS/CdSe quantum dot-sensitized solar cells.
20 nm ZnO nanoparticles are used to fabricate the mesoporous photoanode of the CdS/CdSe quantum dot-sensitized solar cells by the simple doctor blade method. A maximum power conversion efficiency of 4.46% has been achieved, which indicated exciting prospects for ZnO nanoparticle based quantum dot-sensitized solar cells.
متن کامل