Patent ID: 8603849
Filing Date: 2013-12-10
Classification: H01L

Abstract:
1. A method of manufacturing a photovoltaic device, comprising: a1-1) repetitively forming a medium layer containing a semiconductor nitride, a semiconductor oxide or a mixture thereof doped with the same type of impurities as the semiconductor substrate and a semiconductor layer on the upper surface of the semiconductor substrate, thus forming a multilayered composite layer; a1-2) annealing the multilayered composite layer so that semiconductor quantum dots are formed in the medium containing the semiconductor nitride, the semiconductor oxide or the mixture thereof doped with the same type of impurities as the semiconductor substrate, and then performing annealing in a hydrogen atmosphere, thus linking nonbonding electrons of the semiconductor quantum dots with hydrogen; b) forming an array of pores which perforate the thin semiconductor quantum dot film using partial etching; c) depositing a semiconductor doped with complementary impurities to the semiconductor substrate on the thin semiconductor quantum dot film having the array of pores; and d) sequentially forming a transparent conductive film and an upper electrode on the semiconductor doped with the complementary impurities, and forming a lower electrode on a lower surface of the semiconductor substrate.