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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Performance enhancement of small molecular solar cells via luminescent sensitizer 4,5-bis(carbazol-9-yl)-1,2-dicyanobenzene (2CzPN)
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Performance enhancement of small molecular solar cells via luminescent sensitizer 4,5-bis(carbazol-9-yl)-1,2-dicyanobenzene (2CzPN)

机译：通过发光敏化剂4,5-双（咔唑-9-基）-1,2-二氰基苯（2CZPN）的小分子太阳能电池性能增强

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摘要

Enhanced performance of small molecule organic solar cells is presented by incorporating a blue luminescent sensitizer layer 4,5-bis(carbazol-9-yl) -1,2-dicyanobenzene (2CzPN). As a result, 68% enhancement of power conversion efficiency is achieved from 1.54% (without sensitizer 2CzPN) to 2.60% (with 3 nm 2CzPN). The improvement is attributed to the increase of photocurrent and open-circuit voltage (V-OC) because of subphthalocyanine (SubPc) reabsorption of photon from the emission of 2CzPN. The absorption spectrum of 2CzPN is complementary with the donor SubPc, and its photoluminescence spectrum overlaps with the absorption spectrum of the active layer. The V-OC increases from 0.98 V to 1.17 V due to the slightly deeper highest occupied molecular orbital level of 2CzPN than SubPc. The estimated hole injection barrier slightly increases from 0.809 eV (without 2CzPN) to 0.874 eV (with 5 nm 2CzPN) and the hole mobility simultaneously decreases. This strategy provides a facile approach for effective utilization of high-energy photons.
机译：通过掺入蓝色发光敏化剂层4,5-双（咔唑-9-基）-1,2-二氰基苯（2CZPN）来提高小分子有机太阳能电池的增强性能。结果，从1.54％（不含敏化剂2CZPN）达到2.60％（3nm 2czpn），实现了68％的功率转换效率。改善归因于光电流和开路电压（V-OC）的增加，因为来自2CZPN的发射的光子的亚酞菁（Subpc）重吸收。 2CZPN的吸收光谱与供体副本互补，其光致发光光谱与活性层的吸收光谱重叠。 V-OC由于比Subc略深的占用分子轨道水平略深度较深的占用分子轨道水平略深。估计的空穴注入屏障略微增加到0.809eV（没有2CZPN）至0.874eV（具有5nm 2CzPn），并且孔迁移率同时降低。该策略提供了一种有效利用高能光子的容易方法。

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