Deposition of CuCdS2 thin film by single step solution process at low temperature as a novel absorber for photovoltaic applications

作者：Kumar V Nirmal; Suriakarthick R; Hayakawa Y; Hussain Shamima; Bhalerao G M; Gupta Mukul; Sathe Vasant; Gopalakrishnan R^*

来源：Superlattices and Microstructures, 2014, 76: 125-134.

DOI：10.1016/j.spmi.2014.09.030

• CuCdS2
• Chemical bath deposition
• Ternary compound
• Optical properties
• Electrical properties

Thin film of ternary compound semiconductor, copper cadmium sulphide (CuCdS2) was deposited on glass substrate by low temperature solution process. The deposited CuCdS2 thin film was found to suitable for the fabrication of efficient thin film solar cells at low cost. Hexagonal structure of poly crystalline CuCdS2 was formed from the combination of its binary constituents CuxS and CdS. The film was continuously coated and particles were aggregated like spherical granules. The presence of elements Cu, Cd and S were confirmed by electron energy loss spectroscopy and X-ray photoelectron spectroscopy. The absorption spectrum showed that the deposited material had wide range of absorption in visible and near-IR region (300-1100 nm) and band gap was estimated to be 1.42 eV using Tauc%26apos;s plot. Vibration modes of CdS and Cu S binary phases were observed and shift between them revealed the existence of binding state between CdS and CuxS. Hall measurement showed p-type conducting nature of charge carriers with higher carrier concentration 3.48 x 10(18) cm(-3). The mobility and resistivity were measured to be 10.63 cm(2)/V s and 0.17 Omega cm, respectively. The analyses revealed that the deposited CuCdS2 thin film was suitable material for the fabrication of thin film solar cells at low cost.

• 出版日期2014-12