Spray pyrolysis deposition of p-CdTe films: Structural, optical and electrical properties

Physical properties of vacuum evaporated CdTe thin films with post-deposition thermal annealing

“…The optical energy band gap is found to be 1.62 eV and 1.52 eV for as-grown and annealed thin films respectively and found to be decreased for annealed films which may be attributed to the more realignment in orientation and strong interaction between the substrate and vapor atoms. The obtained results of optical energy band gap are in good agreement with earlier reported work [5,10]. The extinction coefficient (k) was calculated using relation concerned [10] and shown in Fig.…”

“…Some new small peaks corresponding to (220) and (211) orientations are also observed for annealed films which might be an indication of phase change at higher annealing temperature. The results are in agreement with the earlier reported work by other authors [3,5,10]. The crystallographic parameters like lattice constant (a), inter planner spacing (d), grain size (D), internal strain (ε), dislocation density (δ) and number of crystallites per unit area (N) were calculated using relations concerned [15,16] and tabulated in Table 1.…”

“…It is one of the most promising materials for enormous potential applications especially in the field of solar cells and optoelectronic devices like γ and X-ray detectors, light emitting diodes (LEDs), field effect transistors (FETs), lasers etc. CdTe is used as absorber layer in thin film solar cells with a window layer which is mostly a CdS layer [5][6][7][8][9].…”

Optical Absorption Enhancement in CdTe Thin Films by Microstructuration of the Silicon Substrate

“…Therefore, it is possible to employ CdTe thin films to produce efficient solar cells with reduced recombination losses and improved short-circuit current density. A further benefit of thin films is that they can be synthesized by several physical and chemical methods, such as chemical bath deposition [ 10 ], spray pyrolysis [ 11 ], thermal evaporation [ 12 ], electrodeposition [ 13 , 14 ], sputtering [ 15 ], and pulsed laser ablation (PLD) [ 16 , 17 , 18 ]. The latter allows the in situ fabrication of solar cells with a precise control of the film width of about 0.2 nm, and can be scaled up for commercialization.…”

Optimization of physical properties of vacuum evaporated CdTe thin films with the application of thermal treatment for solar cells

“…It has enormous potential applications in the field of optoelectronic devices like solar cells, optical and nuclear detectors, light-emitting diodes (LEDs), field effect transistors, nonlinear integrated optical devices, lasers etc. The theoretical conversion efficiency of polycrystalline CdTe thin film solar cells is high (29%) and maximum reported experimental conversion efficiency is 20.4% [10][11][12][13][14][15].…”