Optical properties of CuIn1−xGaxSe2quaternary alloys for solar-energy conversion

Theodoropoulou, S.; Papadimitriou, D.; Anestou, K; Cobet, Ch; Esser, N.

doi:10.1088/0268-1242/24/1/015014

Cited by 39 publications

(22 citation statements)

References 22 publications

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“…Fig. 4 shows the absorption spectra of the reference materials, which are extracted from various sources [39][40][41][42][43][44][45][46] . For the known non-excitonic cells, it is evident that due to the extended absorption spectrum above E g , α(E) is smooth, whereas the organic materials show a strongly fluctuating bands.…”

Section: 2mentioning

confidence: 99%

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An efficient descriptor model for designing materials for solar cells

et al. 2015

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An efficient descriptor model for fast screening of potential materials for solar cell applications is presented. It works for both excitonic and nonexcitonic solar cells materials, and in addition to the energy gap it includes the absorption spectrum (α(E)) of the material. The charge transport properties of the explored materials are modeled using the characteristic diffusion length (L d ) determined for the respective family of compounds. The presented model surpasses the widely used Scharber model developed for bulk-heterojunction solar cells [Scharber et al., Advanced Materials, 2006, 18, 789]. Using published experimental data, we show that the presented model is more accurate in predicting the achievable efficiencies. Although the focus of this work is on organic photovoltaics (OPV), for which the 1 Alharbi et al. Efficient Descriptor for Solar Cells Materials original Scharber model was developed, the model presented here is applicable also to other solar cell technologies. To model both excitonic and non-excitonic systems, two different sets of parameters are used to account for the different modes of operation. The analysis of the presented descriptor model clearly shows the benefit of including α(E) and L d in view of improved screening results.

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Section: 2mentioning

confidence: 99%

“…Finally, both the refractive index (n(E)) and α(E) are calculated from the relation ε 1 (E) + iε 2 (The absorption coefficients of the reference materials; left: non-excitonic cells, right: excitonic cells. The data are extracted from various sources[39][40][41][42][43][44][45][46] .…”

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confidence: 99%

An efficient descriptor model for designing materials for solar cells

et al. 2015

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“…One of the most significant structures is the thin‐film solar cell based on chalcopyrite Cu(In,Ga)Se 2 (CIGS). CIGS is a direct band gap semiconductor with tunable band energy (1.04–1.67 eV), large optical absorption coefficient (≈10 5 cm −1 ), outstanding thermal, environmental and electrical stabilities, the properties of which are even superior to those of conventional crystalline Si and GaAs semiconductors. More importantly, the CIGS heterojunction has gained widespread reputation as a mature solar cell technology simultaneously with very high efficiencies and can be manufactured on both rigid and flexible substrates .…”

Section: Introductionmentioning

confidence: 99%

Piezophototronic Effect Enhanced Photoresponse of the Flexible Cu(In,Ga)Se₂ (CIGS) Heterojunction Photodetectors

Qiao

Liu

Niu

et al. 2018

Adv Funct Materials

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The Cu(In,Ga)Se 2 (CIGS) heterojunction, as a mature and high efficiency thin-film solar cell, is rarely studied as a photodetector, especially in flexible substrates. In this paper, the structure of an ITO/ZnO/CdS/CIGS/ Mo heterojunction is grown on the polyimide (PI) substrate to form a flexible CIGS heterojunction photodetector. The photodetector can work in a very wide band ranging from 350 to 1200 nm with responsivity up to 1.18 A W −1 (808 nm), detectivity up to 6.56 × 10 10 Jones (cmHz 1/2 W −1 ), and response time of 70 (/88) ms, respectively. Moreover, the piezophototronic effect is first used to investigate performance modulation of this device by effectively controlling the separation and transport of carriers at the interface of CdS/ZnO. Interestingly, by externally applying a 0.763% tensile strain, the photoresponsivity and detectivity of the photodetector exhibit a decrease from 1.18 to 0.88 A W −1 , and from 6.56 × 10 10 to 4.81 × 10 10 Jones, respectively, while under a -0.749% externally static compressive strain, the photoresponsivity could be enhanced by ≈75.4% with a maximum of 2.07 A W −1 , and the detectivity is improved by ≈66.1% with its peak value up to 10.9 × 10 10 Jones. Meanwhile, the response time can be modulated from 99(/116) to 41.3(/42.6) ms. This work suggests that the CIGS heterojunction has great potential in novel applications for piezophototronic sensors and also gives a hint to modulate the performance of other multilayer heterostructures via the piezotronic effect.

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“…Besides the fabrication processes, the composition of major constituent elements (Cu, In, Ga, and Se) of a CIGS film is also known to be a significant factor determining the electrical and optical properties of a CIGS solar cell [8,9]. Accordingly, researches about the analysis of elemental composition of CIGS thin films have been increasing recently.…”

Section: Introductionmentioning

confidence: 99%

Application of femtosecond laser ablation inductively coupled plasma mass spectrometry for quantitative analysis of thin Cu(In,Ga)Se2 solar cell films

et al. 2015

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This work reports that the composition of Cu(In,Ga)Se 2 (CIGS) thin solar cell films can be quantitatively predicted with high accuracy and precision by femtosecond laser ablation-inductively coupled plasma-mass spectrometry (fs-LA-ICP-MS). It is demonstrated that the results are strongly influenced by sampling conditions during fs-laser beam (λ = 1030 nm, τ = 450 fs) scanning on the CIGS surface. The fs-LA-ICP-MS signals measured at optimal sampling conditions generally provide a straight line calibration with respect to the reference concentrations measured by inductively coupled plasma optical emission spectroscopy (ICP-OES). The concentration ratios predicted by fs-LA-ICP-MS showed high accuracy, to 95-97% of the values measured with ICP-OES, for Cu, In, Ga, and Se elements.

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Optical properties of CuIn₁₋_xGa_xSe₂quaternary alloys for solar-energy conversion

Cited by 39 publications

References 22 publications

An efficient descriptor model for designing materials for solar cells

An efficient descriptor model for designing materials for solar cells

Piezophototronic Effect Enhanced Photoresponse of the Flexible Cu(In,Ga)Se₂ (CIGS) Heterojunction Photodetectors

Application of femtosecond laser ablation inductively coupled plasma mass spectrometry for quantitative analysis of thin Cu(In,Ga)Se2 solar cell films

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Optical properties of CuIn1−xGaxSe2quaternary alloys for solar-energy conversion

Cited by 39 publications

References 22 publications

An efficient descriptor model for designing materials for solar cells

An efficient descriptor model for designing materials for solar cells

Piezophototronic Effect Enhanced Photoresponse of the Flexible Cu(In,Ga)Se2 (CIGS) Heterojunction Photodetectors

Application of femtosecond laser ablation inductively coupled plasma mass spectrometry for quantitative analysis of thin Cu(In,Ga)Se2 solar cell films

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Optical properties of CuIn₁₋_xGa_xSe₂quaternary alloys for solar-energy conversion

Piezophototronic Effect Enhanced Photoresponse of the Flexible Cu(In,Ga)Se₂ (CIGS) Heterojunction Photodetectors