Charge recombination suppressed CdSeS/CdSe/ZnS QDSSC design

The interest in quantum dot sensitized solar cells (QDSSC), which has theoretically proved to have up 44% energy conversion efficiency recent years, is growing rapidly. Although it high value, PCE obtained studies with QDSSCs far from these values. This situation shows that there are many difficulties be solved QDSSC technology. One of the main challenges technology irradiated load recombination occurring QDSSC. For this reason, study, about using CdSeS QDs as an alternative most used CdS literature order suppress between TiO2 surface and electrolyte QD surfaces. In while were coated on SILAR method, previously synthesized CdSe was chemical deep deposition method. Surfaces last treated ZnS QDs. An optimization study carried out determine ideal number coatings for QDSSCs. As a result, Jsc Voc values TiO2/CdSeS4/CdSe/ZnS 8.799 mA/cm2 0.795 V, respectively, value increased 4.452%.