e-journal

Large Stokes shift downshifting Eu(III)films as efficiency enhancing UV blocking layers for dye sensitized solar cells

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Large Stokes shift downshifting organolanthanide complex,Eu(tta)3phen, is examined for inclusion in polymeric layers to
replace the UVblocking layer in dye sensitized solar cell (DSSC) technology. The UV blocking layer increases stability but power conversion efficiency decreases as incident UV photons are not converted into photocurrent. Eu(tta)3phen doped polymeric film are prepared and attached to DSSC devices following optimized thickness and concentration froma ray-trace numerical model for the specific DSSC. External quantum efficiency is significantly increased in the UV spectral region compared to DSSCs utilizing a passive, non-luminescent, UV-BL. High Eu(tta)3phen film transparency in the visible range minimizes DSSC EQE losses at visible wavelengths. Short-circuit current (Isc) enhancement due
to downshifting is demonstrated (1%) in small-scale DSSC prototypes, where the specific geometry limits the photon
collection efficiency and overall enhancement. Model predictions indicate that 2%–3% Isc enhancement is realizable in
flexible single DSSC compared to, non-luminescent, UV-BL. Added to this, in outdoor conditions taking into account diffuse light, the increment in Isc can increase 50% more. Although photostability of the blended LSS-DS polymer films is not sufficient to be useful for medium-long term outdoor PV applications, the results demonstrate that significant efficiency enhancement can be realized.

Keywords dye-sensitized solar cells, organolanthanides, Stokes shift

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Informasi Detail

Judul Seri

Phys. Status Solidi

No. Panggil

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Penerbit

: WILEY-VCH Verlag GmbH & Co. KGaA., 2015

Deskripsi Fisik

Phys. Status Solidi A 212, No. 1, 203–210 (2015)

Bahasa

English

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

FISIKA

Info Detail Spesifik

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Pernyataan Tanggungjawab

Wati/Agus

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