ABSTRACT

Visible light active metallo-organic systems have gained substantial attention in device applications due to the wide opportunities to tailor their electronic and optical properties. Herein we report the photovoltaic studies carried out on copper ion-containing coordination metallopolymer (copper (II) 1,3,5-triazine-2,4,6-trithiolate\CuTCA) and Titanium dioxide (TiO₂) hybrid solar cells. The CuTCA/TiO₂ solar cells delivered the open-circuit voltage (Voc) of 0.097 V, the short circuit current (Isc) of 0.501 mA/cm², and the power conversion efficiency (PCE) 0.168%. The significant performance enhancement of CuTCA-based solar cells was achieved by introducing cadmium metal ions (Cd²⁺) into the framework of CuTCA through a simple chemical coordination oligomer formation process, followed by anodic polymerization which forms homogeneous Cd-CuTCA polymer. The Cd-CuTCA/TiO₂ solar cells exhibited Voc = 0.111 V, Isc = 0.753 mA/cm², and PCE = 0.348% under 1000 W/m² irradiation condition. The bandgap of CuTCA and Cd-CuTCA was assessed as 2.62 and 2.55 eV, respectively, using UV-Vis absorption. The HOMO and LUMO values of CuTCA and Cd-CuTCA were estimated by cyclic voltammogram. The enhanced PCE of the Cd-CuTCA-based solar cells is ascribed to the enhancement of photoactivity and reduced bandgap in Cd-CuTCA film.

摘要

可见光活性金属有机系统因其电子和光学特性的广泛应用而在设备应用中引起了广泛关注。本文中，我们报告了对含铜离子配位金属聚合物（铜（II）1,3,5-三嗪-2,4,6-三硫代铜盐\ CuTCA）和二氧化钛（TiO ₂）混合太阳能电池进行的光伏研究。CuTCA / TiO ₂太阳能电池的开路电压（Voc）为0.097 V，短路电流（Isc）为0.501 mA / cm ²，功率转换效率（PCE）为0.168％。通过引入镉金属离子（Cd ²⁺通过简单的化学配位低聚物形成过程进入CuTCA的框架，然后进行阳极聚合，形成均相的Cd-CuTCA聚合物。在1000W / m ^2的照射条件下，Cd-CuTCA / TiO ₂太阳能电池的Voc ＝0.111V ，Isc ＝ 0.753mA / cm ²，PCE ＝ 0.348％。使用UV-Vis吸收将CuTCA和Cd-CuTCA的带隙分别评估为2.62和2.55 eV。通过循环伏安法估算CuTCA和Cd-CuTCA的HOMO和LUMO值。基于Cd-CuTCA的太阳能电池的PCE增强归因于Cd-CuTCA膜的光活性增强和带隙减小。