COMPOUND THIN-FILM SOLAR CELL AND PROCESS FOR PRODUCING THE SAME

摘要

A method of fabricating a thin-film compound solar cell having an n-type buffer layer formed therein for providing a heterojunction with a p-type compound semiconductor light absorbing layer formed on a back electrode by applying a chemical bath deposition (CBD) process using an aqueous solution for dipping the light absorbing layer to deposit particles on the surface thereof. In this process, the temperature of the solution is controlled from low to high to increase sizes of the particles to be deposited on the light absorbing layer so as to form the buffer layer which possesses a high optical transmittance, tight adherence to the light absorbing layer and conformity with the transparent electrode formed thereon even if it would be made of InS material generally possessing a small bandgap and hard to pass light of short wavelengths.

主权项

1. A thin-film compound solar cell comprising:
a p-type light absorbing layer; and an n-type buffer layer which is in heterojunction with the light absorbing layer;
wherein the buffer layer includes InOH.InO;wherein the buffer layer includes a first side at a side of the absorbing layer and a second side in an opposite side of the first side;wherein the first side comprises more InS than the second side does;wherein the second side comprises more InOH.InO than the first side does; andwherein the buffer layer is formed of deposits of InS particles and InOH.InO particles on the light absorbing layer, and grain sizes of particles in the second side are larger than grain sizes of particles in the first side.