Yolk-shell m-SiO2@ Nitrogen doped carbon derived zeolitic imidazolate framework high efficient counter electrode for dye-sensitized solar cells

Yolk-Shell m-SiO2@ Nitrogen doped carbon (NC) has been synthesized by carbonization of m-SiO2@ZIF-8 and dispersed in polystyrenesulfonate-doped poly (3, 4-ethylenedioxythiophene) (PEDOT: PSS) to prepare yolk-shell m-SiO2@NC-PEDOT: PSS composite as a counter electrode (CE) for dye-sensitized solar cells (DSSCs). The electrochemical studies confirmed that the yolk-shell m-SiO2@NC-PEDOT: PSS CE exhibits higher catalytic activity compared to (NC-PEDOT: PSS CE and pristine PEDOT: PSS. The DSSCs employing 5% yolk-shell m-SiO2@NC-PEDOT: PSS-PEDOT: PSS composite CE yield photoelectric conversion efficiency (PCE) of 10.01%, which is superior to that of conventional platinum CE (8.50%). Owing to the simple preparation method, low cost and high catalytic activity, the yolk-shell m-SiO2@NC-PEDOT: PSS can be used as efficient Pt-free CE in DSSCs. (C) 2018 Elsevier Ltd. All rights reserved.

通过对m - SiO₂@ZIF - 8进行碳化合成了蛋黄 - 壳结构的m - SiO₂@氮掺杂碳（NC），并将其分散在聚苯乙烯磺酸盐掺杂的聚（3,4 - 乙撑二氧噻吩）（PEDOT:PSS）中，制备了蛋黄 - 壳结构的m - SiO₂@NC - PEDOT:PSS复合材料作为染料敏化太阳能电池（DSSCs）的对电极（CE）。电化学研究证实，与（NC - PEDOT:PSS对电极和原始的PEDOT:PSS相比，蛋黄 - 壳结构的m - SiO₂@NC - PEDOT:PSS对电极表现出更高的催化活性。采用5%蛋黄 - 壳结构的m - SiO₂@NC - PEDOT:PSS - PEDOT:PSS复合对电极的DSSCs产生的光电转换效率（PCE）为10.01%，优于传统的铂对电极（8.50%）。由于制备方法简单、成本低且催化活性高，蛋黄 - 壳结构的m - SiO₂@NC - PEDOT:PSS可作为DSSCs中高效的无铂对电极。（C）2018爱思唯尔有限公司。保留所有权利。