مشخصات پژوهش

عنوان	Aqueous synthesis of CdSeTe‑alloyed quantum dots, fabrication of CdSeTe, CdS and CdSe QDs‑sensitized solar cells and optimization of the sensitizing, light scattering and passivating layers
نوع پژوهش	مقاله چاپ‌شده
کلیدواژه‌ها	CdSeTe NCs; Aqueous synthesis; Multilayer photoelectrode; CdSe QDs; Light scattering layer
چکیده	In this research, quantum dot-sensitized solar cells (QDSCs) with multilayer photoelectrodes, i.e., the TiO2 nanocrystals/ CdSeTe/CdS/CdSe/ZnS, were fabricated and investigated. The CdSeTe nanocrystals (NCs) were easily synthesized in aqueous solution and deposited on nanocrystalline TiO2 scafold through drop-casting method. The other sensitizing/passivizing flms were also prepared by successive ionic layer adsorption and reaction (SILAR) and chemical bath deposition (CBD) methods. It was shown that QDSC with TiO2 nanocrystals/CdSeTe/CdS/ZnS photoanode demonstrated an energy conversion effciency of 2.95%. This efficiency was enhanced about 30% through the addition and optimization of a CdSe QDs film in the photoelectrode. The CdSe-sensitizing flm was effectively deposited in just 9 min and ZnS was applied as the normal passivating film. In the next stage, TiO2 hollow spheres (HSs) were prepared with desired dimension via a template scarifying approach to enhance the light travelling path inside the photoelectrode and increase the light harvesting efficiency. The mentioned point resulted in 12% enhancement compared to the HSs-free QDSC. The last improvement was finally performed by optimization of the ZnS passivating layer and showed a 30% improvement in PCE of the fnal QDSC in comparison with HSs-free CdSeTe/CdS/CdSe-sensitized solar cell. The pioneer cell was compared with the CdSe and HSs-free reference cell which demonstrated a considerable 68% enhancement in photovoltaic performance.
پژوهشگران	سپیده حسین آبادی (نفر سوم)، ندا شهیدی (نفر دوم)، مازیار مرندی (نفر اول)