应用于染料敏化太阳能电池的 CaF: Eu, Tb 荧光共振能量转移。

Fluorescence resonance energy transfer of CaF: Eu, Tb applied to dye-sensitized solar cells.

机构信息

Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, China.

出版信息

Spectrochim Acta A Mol Biomol Spectrosc. 2018 Sep 5;202:76-80. doi: 10.1016/j.saa.2018.05.015. Epub 2018 May 4.

DOI:10.1016/j.saa.2018.05.015

PMID:29778708

Abstract

CaF: Eu, Tb introduced into dye-sensitized solar cells (DSSCs) were studied to examine the influence of luminescent materials on photoanodes using a simple method. The emission spectra of CaF: Eu, Tb included the blue light of Eu (4f → 5d) at 430 nm and green emission of Tb (D → F) at 542 nm under the monitoring wavelengths at 398 nm, which matched well the absorption range of the N719 dye in DSSCs. Energy transfer (ET) was verified between Eu and Tb ions and the efficiency of ET found to increase with Tb concentration. Both the fluorescence resonance and luminescence-mediated ETs between phosphor and N719 dye were observed as the main contribution in improving photocurrent and power conversion efficiency (PCE) of these DSSCs. The PCE of DSSCs doped with phosphors was greatly increased by 5.16, to 43.3%, which was comparable to cells made of pure TiO photoanodes. Moreover, CaF: Eu, Tb enlarged the surface area of TiO photonaodes, which helped the adsorption performance of the TiO film.

摘要

将铕（Eu）和铽（Tb）引入染料敏化太阳能电池（DSSC）中，通过简单的方法研究发光材料对光阳极的影响。在监测波长为 398nm 下，CaF:Eu、Tb 的发射光谱包括 Eu（4f⁇⁇5d）在 430nm 的蓝光和 Tb（D⁇⁇F）在 542nm 的绿光发射，这与 DSSC 中 N719 染料的吸收范围很好地匹配。验证了 Eu 和 Tb 离子之间的能量转移（ET），并发现 ET 效率随着 Tb 浓度的增加而增加。荧光共振和发光介导的磷光体和 N719 染料之间的 ET 都被观察到是提高这些 DSSC 的光电流和功率转换效率（PCE）的主要贡献。掺杂荧光粉的 DSSC 的 PCE 大大提高了 5.16 倍，达到 43.3%，与纯 TiO 光阳极制成的电池相当。此外，CaF:Eu、Tb 扩大了 TiO 光阳极的表面积，这有助于 TiO 薄膜的吸附性能。