Cu-rich copper indium sulfide thin films deposited by co-evaporation for photovoltaic applications

Bangolla, Hemanth Kumar; Nallapureddy, Ramesh Reddy; Kumar, M.C. Santhosh

doi:10.1007/s10854-022-09441-w

Cited by 4 publications

(2 citation statements)

References 57 publications

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“…giving the gap wavelength λg = 560 nm for CuGaS2, λg = 870 nm for CuInS2 and λg = 1220 nm for CuInSe2, in good agreement with the literature, which establishes direct transitions for chalcopyrite compounds [25,27,28]. The presence of some absorption at λ > λg (or E < Eg) is due to tail states that are also typical of chalcopyrite materials [29].…”

Section: Resultssupporting

confidence: 88%

Luminous Transmittance and Color Rendering Characteristics of Evaporated Chalcopyrite Thin Films for Semitransparent Photovoltaics

Guillén

2024

Solids

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The luminous transmittance and the color rendering index of daylight through semitransparent photovoltaic glazing are essential parameters for visual comfort indoors, and they must be considered for different absorber materials that were traditionally developed for opaque solar cells, such as those of the chalcopyrite type. With this aim, various chalcopyrite compounds (CuInSe2, CuInS2 and CuGaS2) were prepared by means of evaporation and then measured to obtain their optical absorption spectra. These experimental data are used here to calculate the solar absorptance (αS), luminous transmittance (τL) and color rendering index (Ra) as a function of the chalcopyrite film thickness. The comparative analysis of the different factors indicates that 70 nm thick CuInSe2 is optimal to guarantee excellent visual comfort (τL = 50% and Ra = 93%) while absorbing as much solar irradiance (αS = 37%) as 130 nm thick CuInS2 or 900 nm thick CuGaS2. The second option (130 nm thick CuInS2) is also considered good (τL = 40% and Ra = 80%), but for CuGaS2, the thickness should be kept below 250 nm in order to obtain a suitable color rendering Ra ≥ 60%.

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Section: Resultssupporting

confidence: 88%

Luminous Transmittance and Color Rendering Characteristics of Evaporated Chalcopyrite Thin Films for Semitransparent Photovoltaics

Guillén

2024

Solids

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“…Therefore, substituting the anion Se by S is expected to change both VBM and CBM in CuInS 2 with respect to CuInSe 2 , but substituting In by Ga changes only the CBM but not the VBM in CuGaS 2 with respect to CuInS 2 . The forbidden bandwidth is the energy difference between CBM and VBM, which is observed at 1.02 eV for CuInSe 2 [32], and higher for CuInS 2 and CuGaS 2 according to the literature [33][34].…”

Section: Resultsmentioning

confidence: 87%

Evaporated Chalcopyrite Thin Films for Indoor Photovoltaic Applications

Guillén

2023

Advanced Energy Conversion Materials

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The feasibility of capturing indoor artificial light using chalcopyrite photovoltaic absorbers has been analyzed. For this purpose, various chalcopyrite compounds (CuInSe2, CuInS2 and CuGaS2) were prepared by evaporation and then measured to obtain their main structural, morphological and optical characteristics. On the other hand, several artificial light sources were selected (incandescent, halogen, fluorescent, high-pressure sodium, metal halide and LED lamps) and represented by their respective spectral radiance. The absorption characteristics of CuInSe2 and CuInS2 are optimal for collecting light from fluorescent lamps and warm or cool white LEDs, requiring only a small film thickness of about 0.6 μm to capture 90-100% of the light radiance. Otherwise, the efficiency of CuGaS2 is found to increase as the color temperature of the LED lamp increases, being always lower and more dependent on the film thickness than for the other evaporated compounds. The worst performances (collection of less than 50% of the light radiance) correspond to incandescent and halogen lamps, which have a significant emission in the infrared region outside the absorption range of the evaporated chalcopyrite films. These results provide guidelines for the design of chalcopyrite-based photovoltaic devices suitable for operation under different indoor lighting conditions.

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Tailoring the opto-electronic properties of SnS thin films by indium doping and fabrication of heterojunction diodes

Philip,

Santhosh Kumar

2024

Materials Science in Semiconductor Processing

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Cu-rich copper indium sulfide thin films deposited by co-evaporation for photovoltaic applications

Cited by 4 publications

References 57 publications

Luminous Transmittance and Color Rendering Characteristics of Evaporated Chalcopyrite Thin Films for Semitransparent Photovoltaics

Luminous Transmittance and Color Rendering Characteristics of Evaporated Chalcopyrite Thin Films for Semitransparent Photovoltaics

Evaporated Chalcopyrite Thin Films for Indoor Photovoltaic Applications

Tailoring the opto-electronic properties of SnS thin films by indium doping and fabrication of heterojunction diodes

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