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Article Dans Une Revue physica status solidi (c) Année : 2013

Investigation of luminescent properties of ZnO nanoparticles for their use as a down-shifting layer on solar cells

Résumé

Commercially available solar cells (e.g. CdS/CdTe, CIGS, c-Si) have a spectrally narrow absorption band when compared to the solar emission spectrum. The UV-wavelength response of a solar cell (SC) can be improved by the application of a luminescent down-shifting layer (LDSL) on the SC front side, permitting the conversion of short-wavelength photons to the longer wavelength photons better matching the SC’s absorption spectrum. The ideal down-shifting material must possess a large Stokes shift and have a high luminescence quantum yield. We propose the use of the LDSL containing ZnO nano-particles of less than 5 nm in diameter able to absorb UV light (λ < 400 nm), where the solar cell spectral response (SR) is low, and re-emitting at longer wavelengths (λ > 425 nm), where the typical SC’s SR increases. ZnO na-noparticles were synthesized by a low energy cluster beam deposition (LECBD) technique and their lumines-cent properties were studied as a function of the oxygen partial pressure (OPP) applied during the deposition pro-cess. The stoichiometry and crystallinity of ZnO nanoparticles can be controlled via the adjustment of the OPP. It was also observed that there exists an optimal value of the oxygen pressure introduced during the LECBD process, which permits to obtain the highest visible photoluminescence emission, necessary for an ef-ficient down-shifting. The yield of the down-shifting in ZnO nanoparticle layer was determined varying the excitation wavelength using the photoluminescence excitation technique.
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Dates et versions

hal-01809510 , version 1 (17-01-2022)

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Paternité - Pas d'utilisation commerciale

Identifiants

Citer

Aleksandra Apostoluk, Yao Zhu, Bruno Canut, Bruno Masenelli, Jean-Jacques Delaunay, et al.. Investigation of luminescent properties of ZnO nanoparticles for their use as a down-shifting layer on solar cells. physica status solidi (c), 2013, 10 (10), pp.1301-1307. ⟨10.1002/pssc.201200950⟩. ⟨hal-01809510⟩
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