One of the current versions of sensitized solar cells is the liquid-electrolyte-based dye- sensitized solar cell (DSSC), which was developed in the 1990s. Certified efficiencies exceeding 11% have been demonstrated for laboratory cells (Sharp) and 6%-7% for modules. Tandem versions of the cell have reached 15% conversion efficiencies. Quantum dot sensitized solar cells (QDSSCs), which belong to the third-generation photovoltaic devices, have drawn enormous attention in recent years because of the possibility of boosting their efficiencies beyond the theoretical limit proposed by Shockley-Quiesser (Nozik, 2002). Abstract Here we demonstrate a CdS quantum dot (QD) sensitized solar cell with significantly enhanced stability and depressed recombination in I − /I 3− electrolyte. The CdS QDs were deposited in a mesoporous TiO 2 film using chemical bath deposition. The presented design introduces new degrees of freedom in the utilization of quantum dot sensitizers for photovoltaic cells. In particular, it opens the way toward the utilization of new materials whose band offsets do not allow direct charge injection. KEYWORDS: quantum dots semiconductor nanocrystals Förster resonance energy Quantum dots also have properties combined between bulk semiconductors and atoms. Quantum dot-sensitized solar cells (QDSSCs) are observed as the most promising applicant for the development of next-generation solar cells because QDSSCs can be fabricated by low-cost and simple techniques [ 2 ]. in this aspect, semiconductor quantum dots (qds) have shown extremely attractive properties for the development of solar cells overcoming the current limitations.2the demon- stration of an efficient multiple exciton generation (meg) process in colloidal qds,3,4despite certain controversy,5has aroused a huge interest in the use of these materials in … CdS-sensitized TiO2 photoelectrodes for quantum dots-based solar cells - Volume 28 Issue 3 Quantum dot-sensitized solar cells (QDSCs) are another promising generation of solar cells due to the unique characteristics of semiconductor nanocrystals (NCs) applied as the light sensitizers [1,2,3,4,5].These properties could be mentioned as tunable bandgap energy [6,7,8,9], high molar absorption coefficient [10, 11], multiple exciton generation or impact ionization (MEG) [12, 13 This dissertation addresses the inefficiencies of quantum dot sensitized cells from the standpoint of electron transfer reactions. The electron transfer rate from CdSe quantum dots to TiO2 nanoparticles was modeled with both a many-state Marcus model as well as a through space ballistic tunneling model. The band gap, conduction band energy level, and density of defect trap states of the QDs can be conveniently tailored through composition engineering. The quinary alloyed QDs deliver a new certified efficiency record of 14.4 % for quantum-dot-sensitized solar cells. We report high-performance quantum dots-sanitized all-weather solar cells (QDSSCs). The devices were based on rationally designed carbon quantum dots (CQDs) decorated oxygen and sulfur co-doped graphitic carbon nitride nanotubes (O, S-g-C 3 N 4 NTs)-sensitized TiO 2 /long-persistence phosphor (LPP) photoanodes and Pt counter electrodes (CE). Among all the alternative energy including wind, nuclear, tidal and geothermal energy, solar energy has emerged as a potential and marketable competitor. As a type of third