Carbazole-phenothiazine sensitizers boost tandem DSSC efficiency to 12.85 %

IF 4.1 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments Pub Date : 2024-11-12 DOI:10.1016/j.dyepig.2024.112540

Mohamed R. Elmorsy , Safa A. Badawy , Hagar S. Elmetwaly , Esraa H. Elrewiny , Fatma M. Eshra , Ahmed E. Soliman , Kholoud E. Salem , Ehab Abdel-Latif , M. M. Elkholy

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Abstract

This study presents a significant advancement in tandem dye-sensitized solar cells (T-DSSCs) through the development of two carbazole-phenothiazine hybrid sensitizers, AEFH-1 and AEFH-2. AEFH-2, featuring a 4-carboxylcyanoacetamide acceptor group, thus achieving a remarkable power conversion efficiency (PCE) of 11.70 %, surpassing AEFH-1 (10.21 %) and the standard N719 dye (7.60 %). The superior performance of AEFH-2 is attributed to its optimized molecular design, which enhances the charge separation and electron injection efficiency. The incident photon-to-current efficiency (IPCE) of AEFH-2 reached 91.54 %, which was significantly higher than that of N719 (77.0 %) because of its strong electron-withdrawing groups and multiple anchoring functionalities, which improved TiO₂ binding and charge transfer. Furthermore, an innovative double-sided parallel tandem DSSC (PT-DSSC) architecture was developed by integrating (N719 (top) and AEFH-2 (bottom)), resulting in a PCE of 12.85 %. This configuration exhibited exceptional photovoltaic parameters, including a Voc of 0.900 V, Jsc of 21.01 mA/cm², and a fill factor of 67.95 %. The high IPCE of 97.50 % in the tandem setup was attributed to the complementary absorption profiles of N719 and AEFH-2, coupled with the light-trapping effect of the double-sided structure, enabling superior light harvesting and charge separation. Stability analysis further confirmed the durability of the tandem PT-DSSC, with performance maintained over 1000 h of continuous illumination, thus emphasizing its practical applicability. These findings underscore the potential of molecular engineering and architectural innovation to significantly enhance the efficiency and scalability of DSSCs, paving the way for high-performance, long-lasting solar energy devices.

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咔唑-吩噻嗪敏化剂将串联 DSSC 效率提高到 12.85

本研究通过开发两种咔唑-吩噻嗪混合敏化剂 AEFH-1 和 AEFH-2，展示了串联染料敏化太阳能电池（T-DSSC）的重大进展。AEFH-2具有4-羧基氰乙酰胺受体基团，因此实现了11.70%的显著功率转换效率（PCE），超过了AEFH-1（10.21%）和标准N719染料（7.60%）。AEFH-2 的优异性能归功于其优化的分子设计，它提高了电荷分离和电子注入效率。AEFH-2 的入射光子对电流效率（IPCE）达到 91.54%，明显高于 N719（77.0%），这是因为它具有强的电子吸收基团和多重锚定功能，从而改善了 TiO2 的结合和电荷转移。此外，通过整合（N719（上）和 AEFH-2（下）），还开发出一种创新的双面平行串联 DSSC（PT-DSSC）结构，使 PCE 达到 12.85%。这种配置显示出卓越的光伏参数，包括 0.900 V 的 Voc、21.01 mA/cm2 的 Jsc 和 67.95 % 的填充因子。串联设置的 IPCE 高达 97.50%，这归功于 N719 和 AEFH-2 的互补吸收特性，以及双面结构的光捕获效应，从而实现了出色的光收集和电荷分离。稳定性分析进一步证实了串联 PT-DSSC 的耐用性，其性能可在连续光照 1000 小时后保持不变，从而强调了其实际应用性。这些发现强调了分子工程和结构创新在显著提高 DSSC 的效率和可扩展性方面的潜力，为实现高性能、长寿命的太阳能设备铺平了道路。

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来源期刊

Dyes and Pigments 工程技术-材料科学：纺织

CiteScore

8.20

自引率

13.30%

发文量

933

审稿时长

33 days

期刊介绍： Dyes and Pigments covers the scientific and technical aspects of the chemistry and physics of dyes, pigments and their intermediates. Emphasis is placed on the properties of the colouring matters themselves rather than on their applications or the system in which they may be applied. Thus the journal accepts research and review papers on the synthesis of dyes, pigments and intermediates, their physical or chemical properties, e.g. spectroscopic, surface, solution or solid state characteristics, the physical aspects of their preparation, e.g. precipitation, nucleation and growth, crystal formation, liquid crystalline characteristics, their photochemical, ecological or biological properties and the relationship between colour and chemical constitution. However, papers are considered which deal with the more fundamental aspects of colourant application and of the interactions of colourants with substrates or media. The journal will interest a wide variety of workers in a range of disciplines whose work involves dyes, pigments and their intermediates, and provides a platform for investigators with common interests but diverse fields of activity such as cosmetics, reprographics, dye and pigment synthesis, medical research, polymers, etc.