Photo current metastability in Cu(In,Ga)Se2 solar cells with controlled conduction band alignment

Hori, Hiroki; Minemoto, Takashi; Takakura, Hideyuki

doi:10.1016/j.cap.2009.11.023

Cited by 16 publications

(7 citation statements)

References 6 publications

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“…The sample in case iii was subjected to ultrasonic cleaning prior to the buffer deposition. The impact of treatments at the absorber interface on metastability has been noted in other experimental studies and may influence the growth of the film. Also, as mentioned earlier, buffer depositions are known to be sensitive to a number of conditions that are controlled only to the extent that is convenient with typical wet chemistry procedures.…”

Section: Jv Curves and Device Modeling Of Buffer Variationsmentioning

confidence: 61%

Large metastability in Cu (In,Ga)Se₂ devices: The importance of buffer properties

Repins

Glynn

Silverman

et al. 2019

Progress in Photovoltaics

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Some commercial Cu (In,Ga)Se2 (CIGS) modules show large changes in current‐voltage parameters with light soaking. While such changes are not necessarily indicative of a performance problem, the associated uncertainty may be disadvantageous in a highly competitive market. Thus, it is beneficial to understand the origin of large metastabilities in order to define what processing changes might diminish metastability without impacting other desirable aspects of high‐performance devices. This study attempts to reproduce large metastabilities like those in some commercial products both through absorber and buffer processing variations in small devices. While variations of both types were found to affect metastability, only buffer variations could reproduce large metastability in high‐efficiency devices. Device modeling confirms that buffer effects alone are sufficient to explain the large metastability seen in these devices.

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Section: Jv Curves and Device Modeling Of Buffer Variationsmentioning

confidence: 61%

Large metastability in Cu (In,Ga)Se₂ devices: The importance of buffer properties

Repins

Glynn

Silverman

et al. 2019

Progress in Photovoltaics

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“…The hetero junction engineering by the CBO matching dominates both diode and photo currents, indicating that the CBO control is important to achieve high efficiency. Also, we pointed out that the CBO matching influenced photo J-V meta-stability so-called light soaking effect [11][12][13].…”

Section: Resultsmentioning

confidence: 90%

Hetero Junction Engineering for High Efficiency Cu(In,Ga)Se<sub>2</sub> Solar Cells

Minemoto

2011

Extended Abstracts of the 2011 International Conference on Solid State Devices and Materials

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“…Its electron affinity (χ = 3.80eV) is very close to that of optimized Zn 1-x Mg x O (χ=3.81eV) with 20%Mg. As shown in figure 1 there is a pretty good conduction band offset (CBO) between Si and ZnS: e.χ Si -e. χ ZnS = 0.15 eV According to Minemoto et al [7], CBO should be lower than 0.3eV to achieve adequate energy band alignment and avoid recombination losses.…”

Section: Introductionmentioning

confidence: 99%

Innovative emitter design for low-cost silicon based heterostructure solar cells

Boumaour

Bahfir

Sali

et al. 2014

2014 North African Workshop on Dielectic Materials for Photovoltaic Systems (NAWDMPV)

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N+ transparent conductor oxides (TCO's) can be a valuable and low-cost alternative to conventional thermally diffused emitter of silicon based solar cells. With reduced resistivities by appropriate doping and considering lattice mismatch and energy band offsets at the interface with p-silicon substrate, predictive study by numerical simulation shows comparable performance between ZnS:Al and TiO 2 :Nb with conversion efficiencies >16%. Furthermore, a back surface field achieved by a thin Sb 2 Te 3 can enhance the efficiency with values higher than 18.5%.

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Photo current metastability in Cu(In,Ga)Se2 solar cells with controlled conduction band alignment

Cited by 16 publications

References 6 publications

Large metastability in Cu (In,Ga)Se₂ devices: The importance of buffer properties

Large metastability in Cu (In,Ga)Se₂ devices: The importance of buffer properties

Hetero Junction Engineering for High Efficiency Cu(In,Ga)Se<sub>2</sub> Solar Cells

Innovative emitter design for low-cost silicon based heterostructure solar cells

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Photo current metastability in Cu(In,Ga)Se2 solar cells with controlled conduction band alignment

Cited by 16 publications

References 6 publications

Large metastability in Cu (In,Ga)Se2 devices: The importance of buffer properties

Large metastability in Cu (In,Ga)Se2 devices: The importance of buffer properties

Hetero Junction Engineering for High Efficiency Cu(In,Ga)Se<sub>2</sub> Solar Cells

Innovative emitter design for low-cost silicon based heterostructure solar cells

Contact Info

Product

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Large metastability in Cu (In,Ga)Se₂ devices: The importance of buffer properties

Large metastability in Cu (In,Ga)Se₂ devices: The importance of buffer properties