Solar cell with PbS extremely thin absorber (eta) on porous substrate based on novel eta concept

Citation:
Musembi RJ, Aduda BO, Mwabora JM, Bayon R, Belaidi A, Bär M, Gumiskaya T, Th. Dittrich, Lux-Steiner MC. "Solar cell with PbS extremely thin absorber (eta) on porous substrate based on novel eta concept.". In: 6th Edward Bouchet Abdus Salam Institute International Conference on Physics and Technology for sustainable development in Africa (EBASI2007). Cape Town, South Africa ; 2007.

Date Presented:

23-26 January

Abstract:

A new highly structured TiO2/In(OH)xSy/PbS/PEDOT:PSS solar cell has been developed based on the novel eta concept, and characterized by photovoltage spectroscopy, X-ray photoelectron and Auger electron spectroscopies, scanning electron spectroscopy, photovoltaic response and quantum efficiency spectroscopy. In this system, TiO2, In(OH)xSy, PbS and PEDOT: PSS serve as electron conductor, recombination barrier, absorber and hole conductor respectively. The buffer and the absorber layer were prepared by chemical bath deposition, while the electron and hole conductor were prepared by spray pyrolysis/sol-gel and spin coating respectively. The band gap of as prepared In(OH)xSy has been found to vary with PH of the solution, also the band gap of PbS can be engineered to make it suitable as absorber material for solar cell application. At present, a solar cell device has been realized with efficiency up to over 1%, Jsc = 8 mA/cm2 and Voc= 3.0 V.

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