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首页> 外文期刊>Physical chemistry chemical physics: PCCP >Multijunction organic photovoltaics with a broad spectral response
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Multijunction organic photovoltaics with a broad spectral response

机译：具有宽光谱响应的多结有机光伏

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摘要

We demonstrate series-integrated multijunction organic photovoltaics fabricated monolithically by vapor-deposition in a transposed subcell order with the near-infrared-absorbing subcell in front of the green-absorbing subcell. This transposed subcell order is enabled by the highly complementary absorption spectra of a near-infrared-absorbing visibly-transparent subcell and a visible-absorbing subcell and motivated by the non-spatially-uniform optical intensity in nanoscale photovoltaics. The subcell order and thicknesses are optimized via transfer-matrix formalism and short-circuit current simulations. An efficient charge recombination zone consisting of layers of BCP/Ag/ MoOx leads to negligible voltage and series-resistance losses. Under 1-sun illumination the multijunction solar cells exhibit a power conversion efficiency of 5.5 ± 0.2% with an FF of 0.685 ± 0.002 and a V_(OC) of 1.65 ± 0.02 V, corresponding to the sum of the V_(OC) of the component subcells. These devices exhibit a broad spectral response (in the wavelength range of 350 nm to 850 nm) but are limited by subcell external quantum efficiencies between 20% and 30% over the photoactive spectrum.
机译：我们演示了串联集成的多结有机光伏器件，该器件通过汽相沉积以换位子电池顺序与近红外吸收子电池位于绿色吸收子电池的前面以整体方式制造。这种转置的子电池顺序是由近红外吸收可见透明子电池和可见吸收子电池的高度互补吸收光谱实现的，并且由纳米级光伏中的空间上不均匀的光强度激发。通过传递矩阵形式和短路电流仿真来优化子电池的顺序和厚度。由BCP / Ag / MoOx层组成的有效电荷复合区导致电压和串联电阻损耗可忽略不计。在1阳光照射下，多结太阳能电池的功率转换效率为5.5±0.2％，FF为0.685±0.002，V_（OC）为1.65±0.02 V，对应于V_（OC）的总和。组件子单元。这些器件表现出较宽的光谱响应（在350 nm至850 nm的波长范围内），但受到子池外部光子效率（在光敏光谱上的20％到30％之间）的限制。

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