Photoelectric properties of Bi₂Se₃ films grown by thermal evaporation method

Abstract

The Bi 2 Se 3 films were prepared by thermal evaporation on different substrates (FTO, ITO and Glass). The structure and morphology are characterized by XRD and SEM. The optical band gap (E g ) is 1.47 eV, 1.54 eV, and 1.59 eV, respectively. The I-V and C-V curves have been obtained by a photoelectrochemical (PEC) cell system, and the results indicated the Bi 2 Se 3 film is n-type semiconductor. The transient photocurrent response of Bi 2 Se 3 /FTO and Bi 2 Se 3 /ITO were measured to evaluate the application potential of Bi 2 Se 3 films in solar cell. The above results indicated that the Bi 2 Se 3 films have advantages in the application of solar cells.

The coexistence of high piezoelectricity and superior optical absorption in Janus Bi2X2Y (X = Te, Se; Y = Te, Se, S) monolayers

“…The absorption peaks of our results, which range from 2.5 eV (∼500 nm) to 4.0 eV (∼310 nm), align well with that of the Bi 2 Se 3 film (300–500 nm) synthesized by the thermal evaporation method. 87 Our results show that the Janus Bi 2 X 2 Y materials have excellent optical absorption effects in blue-UV light regions and can be compared to those of GaAs (2.5 × 10 5 cm −1 ) and CH 3 NH 3 PbI 3 (3 × 10 5 cm −1 ), 88 which are the ultrahigh conversion efficiency absorber for the thin-film solar cells and the much-anticipated absorber for solar cells. Taking Bi 2 Se 2 S as an example, as shown in Fig.…”

“…The absorption peaks of our results, which range from 2.5 eV (B500 nm) to 4.0 eV (B310 nm), align well with that of the Bi 2 Se 3 film (300-500 nm) synthesized by the thermal evaporation method. 87 Our results show that the Janus Bi 2 X 2 Y materials have excellent optical absorption effects in blue-UV light regions and can be compared to those of GaAs (2.5 Â 10 5 cm À1 ) and CH 3 NH 3 PbI 3 Fig. 10 The projected band structure, projected density of states (PDOS), total density of states (TDOS), and optical absorption spectra of Janus Bi 2 Se 2 S monolayer at the PBE level.…”

Silver sulfide thin film solar cells: materials, fabrication methods, devices, and challenges

“…The thermal evaporation method is a process in which the coating material is heated under high vacuum conditions to evaporate and deposit onto the substrate surface, forming a This journal is © The Royal Society of Chemistry 2023 thin film. [67][68][69] M. M. El-Nahass et al used the thermal evaporation method to prepare Ag 2 S thin films with a monoclinic phase structure, suitable stoichiometry, and good crystallinity under the following conditions: a temperature of 300 K, a vacuum pressure of 10 À4 Pa, and a deposition rate of 2.5 nm s À1 . Additionally, the oscillator energy (E 0 ), dispersion energy (E d ), film bandgap, and relevant phonon energy of the Ag 2 S thin film were measured to be 5 eV, 32.5 eV, 0.93 eV, and 0.05 eV, respectively.…”

Preparation and investigation of structure, optical, nonlinear optical and thermoelectric properties of Bi 2 Se 3 thin film

“…It was noticed that, the temperature increase electron-hole generation [33]. IV characteristics were studied [35][36][37]. It was found that, the IV behavior increase with annealing [35].…”