Details

Autor(en) / Beteiligte

• Moholkar, A.V.
• Shinde, S.S.
• Agawane, G.L.
• Jo, S.H.
• Rajpure, K.Y.
• Patil, P.S.
• Bhosale, C.H.
• Kim, J.H.

Titel

Studies of compositional dependent CZTS thin film solar cells by pulsed laser deposition technique: An attempt to improve the efficiency

Ist Teil von

• Journal of alloys and compounds, 2012-12, Vol.544, p.145-151

Ort / Verlag

Kidlington: Elsevier B.V

Erscheinungsjahr

2012

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• ► Synthesis of CZTS thin films by PLD. ► Effect of stoichiometry, its deviation on the physical properties. ► Improvement in conversion efficiency using CZTS absorber layer. The performance of CZTS thin films deposited by using pulsed laser deposition technique is investigated as a function of target composition. The chemical composition ratio a=Cu/(Zn+Sn) of the target material has been varied from 0.8 to 1.2 in step of 0.1 by keeping Zn/Sn constant. The effect of the chemical composition in the precursor thin films on the structural, morphological, chemical and optical properties of the CZTS thin films has been investigated. X-ray diffraction and X-ray photoelectron spectroscopy studies showed that the annealed CZTS thin films are of a single kesterite crystal structure without any other secondary phases. The direct band gap energy of the CZTS thin films is found to decrease from 1.72–1.53eV with increase of ‘a’. The estimated band-gap energy from the quantum efficiency measurements is about 1.54eV. The solar cell fabricated with Glass/Mo/CZTS/CdS/ZnO:Al/Al structure grown using [a=Cu/(Zn+Sn)=1.1] showed the best conversion efficiency of 4.13% with Voc=700mV, Jsc=10.01mA/cm2 and FF=0.59.