SYNTHESIS OF Cu(Zn,Sn)Se2 NANOPARTICLES FOR ABSORBER LAYER APPLICATIONS IN SOLAR CELLS

Abstract

In this study, we focus on synthesizing Cu (Zn,Sn)Se₂ (CZTSe) nanoparticles for applications as light absorber layer in solar cells. The nanoparticles after synthesis are coated into films and annealed at different ambiences. CZTSe nanoparticles are synthesized by hot-injection method at 220 °C in nitrogen ambience. The obtained CZTSe nanoparticles have a completely single-phase structure and the diameter is in the range of 6-20 nm and high crystallinity. The CZTSe thin films after being annealed in a nitrogen ambience show that the CZTSe phase is decomposed into other phases. In contrast, when CZTSe films are annealed in a selenium ambience, the phase decomposition was not seen, large crystal particles were formed and big crystal particles sized ~ 1µm. These results indicate that the synthesized CZTSe nanoparticles have a great potential for applications as an absorbing layer in CZTSe solar cells.