Optical and electrical properties study of sol-gel derived Cu2ZnSnS4 thin films for solar cells

Abstract

The fabrication of environmental-friendly Cu2ZnSnS4 (CZTS) thin films with pure kesterite phase is always a challenge to researchers in the field of solar cells. We introduce a simple non-vacuum sol-gel method to fabricate kesterite CZTS films. Ethylenediamine is used as the chelating agent and stabilizer and plays an important role in preparing stable precursor. X-ray diffraction, Raman and scanning electron microscopy studies suggest that the microstructure and optical properties of CZTS films depend strongly on annealing temperatures. The temperature dependence of conductivity of 500 °C annealed CZTS film shows that the Mott law dominates in the low temperature region and thermionic emission is predominant at high temperatures.

Chaotic signatures of photoconductive Cu2ZnSnS4nanostructures explored by Lorenz attractors

“…Figure 3 shows the optical absorption spectrum of the samples. This data matches with previous measurements in comparative samples [27,28]. In the ultraviolet region, close to 300 nm wavelength can be observed a well-defined peak associated with the SiO 2 substrate absorbance.…”

Point defects, compositional fluctuations, and secondary phases in non-stoichiometric kesterites

“…Valuable results about the kesterite thin film surfaces were obtained by using micro [81,[110][111][112][113] and macro [114,115] Raman mappings (e.g. see figure 13).…”

Correlation between interface modification and rectifying behavior of p-type Cu2ZnSnS4/n-type Si diodes

“…Figure 1 shows XRD patterns of CZTS films. The diffraction pattern reveals only the presence of the peak corresponding to reflections from the (112) plane [16,26] and no second phase peaks. For CZTS films, the characteristic (112) peak was recorded at a Bragg angle of 28.55°.…”

“…CZTS shows intrinsic p-type conductivity. All the constituent elements in CZTS are naturally abundant and nontoxic, and CZTS has a band gap of 1.5 eV with a high light absorption coefficient [16][17][18][19][20]. CZTS films grown on Si have been extensively investigated for their wide optoelectronic applications [21][22][23][24][25].…”