Panchromatic ternary/quaternary polymer/fullerene BHJ solar cells based on novel silicon naphthalocyanine and silicon phthalocyanine dye sensitizers
Panchromatic ternary/quaternary polymer/fullerene BHJ solar cells based on novel silicon naphthalocyanine and silicon phthalocyanine dye sensitizers
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DOI：
10.1039/c6ta08729a
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发表时间：
2017-02-14
影响因子：
11.9
通讯作者：
Ameri, Tayebeh
中科院分区：
文献类型：
--
作者：
Ke, Lili;Gasparini, Nicola;Ameri, Tayebeh
通过引入第三组分和第四组分在整个太阳光谱中更有效地收集光，为基于聚合物/富勒烯共混物的高效有机太阳能电池的发展提供了一条新的途径。近年来，染料分子在近红外领域被用作有前途的捕光光敏剂。在本论文中，我们报道了一种新型的硅萘菁(SINC-1)的设计、合成和应用，作为一种有效的光敏剂，在单色三元器件和多色共敏化四元器件中，加入了硅酞菁(SIPC-0或SIPC-1)作为第四组分来补充SINC-1的光谱吸收。用电学、光学和先进的表征技术研究了三元共混物光敏性增强背后的主要络合物电荷转移/输运机理。对覆盖UV-Vis以及350-900 nm近红外区域的多色染料敏化器件的外部量子效率(EQE)测量概述了每种染料的表观信号特征，证实了SIPC和SINC染料对提高短路电流密度(JSC)的有效贡献。我们的结果进一步说明了多色染料敏化概念作为一种有效的方法来缓解有机光电子器件中通常遇到的非理想光吸收的潜力。
More efficient light harvesting throughout the whole solar spectrum by introducing third and fourth components offers a new pathway towards the development of high efficiency organic solar cells based on polymer/fullerene blends. Recently, dye molecules have been utilized as promising light harvesting photosensitizers in the near-IR region. Herein, we report the design, synthesis and application of a novel silicon naphthalocyanine (SiNC-1) as an efficient photosensitizer in single dye ternary devices as well as in multi-colored co-sensitized quaternary devices, incorporating a silicon phthalocyanine (SiPC-0 or SiPC-1) as the fourth component to complement the spectral absorption of the SiNC-1. The dominant complex charge transfer/transport mechanism behind the enhanced photosensitivity of the ternary blend has been investigated by means of electrical, optical, and advanced characterization techniques. External quantum efficiency (EQE) measurements on multi- colored dye sensitized devices covering the UV-vis as well as near-IR regions from 350 up to 900 nm outline apparent signal characteristics of each single dye, corroborating the effective contribution of both SiPC and SiNC dyes to enhancing the short-circuit current density (JSC). Our results further illustrate the potential of the multi- colored dye sensitization concept as a powerful approach to mitigate the non-ideal optical absorption normally encountered in organic-based optoelectronic devices.