Nanostructured Hybrid Solar Cells: Dependence of the Open Circuit Voltage on the Interfacial Composition
Nanostructured Hybrid Solar Cells: Dependence of the Open Circuit Voltage on the Interfacial Composition
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纳米结构混合太阳能电池：开路电压对界面成分的依赖性
DOI：
10.1002/adma.201001967
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发表时间：
2010
影响因子：
29.4
通讯作者：
C. Hawker
中科院分区：
文献类型：
--
作者：
N. Treat;Luis M. Campos;M. Dimitriou;Biwu Ma;M. Chabinyc;C. Hawker
使用透明金属氧化物阴极制造的倒置聚合物太阳能电池[1，2]由于其与常规结构的有机太阳能电池相比具有改善寿命和性能的潜力而受到显著关注。[3]这种设计的另一个吸引人的特征是，可以采用低温、溶液处理的金属氧化物，从而允许与塑料基材相容。[4]我们已经使用软压印光刻图案化的解决方案可加工的非晶二氧化钛（a-TiO x），并检查电极表面积和活性层的处理程序上的性能的聚（3-己基噻吩）（P3 HT）和[6，6]-苯基-C61-丁酸甲酯（PCBM）的体异质结（BHJ）的效果。增加二极管的电极表面积显著改善了正向偏压下的电荷注入，但对电荷提取的影响不大。开路电压Voc对电极几何形状和加工方法都很敏感，表明纳米孔中BHJ的形态不均匀，这会影响开路电压。最先进的硅基光致发光器件的可负担的生产受到对具有低电子缺陷密度的大面积硅衬底的需要的限制。[5]薄膜有机光致发光材料（OPV）由于其溶液可加工性而提供了在几乎任何尺寸的衬底上以低成本制造的潜力。[6]OPV已经实现了接近8%的功率转换效率，这接近于实现经济可行性所需的10%的估计效率[6，7]，并且目前受到其太阳光谱覆盖范围[8]和电池中光电损失过程的限制。[7，9]通过合成新材料[7]以及对电荷载流子产生和损失的性质的基本理解，已经做出了重大努力来提高其效率。[10个国家]
Inverted polymer solar cells [1, 2] fabricated using transparent metal oxide cathodes have received significant attention due to their potential for improved lifetime and performance compared to conventionally structured organic solar cells.[3] An additional attractive feature of this design is that low temperature, solution processed metal oxides can be employed allowing for compatibility with plastic substrates.[4] We have used soft imprint lithography to pattern solution-processable amorphous titanium sub-oxide (a-TiO x) and to examine the effect of electrode surface area and active layer processing procedures on performance of bulk heterojunctions (BHJs) of poly (3-hexylthiophene)(P3HT) and [6, 6]-phenyl-C61-butyric acid methyl ester (PCBM). Increasing the electrode surface area of the diodes noticeably improved the charge injection in forward bias, but had little effect on charge extraction. The open circuit voltage, Voc, was sensitive to both the electrode geometry and processing method, suggesting a non-uniform morphology for the BHJ in the nanopores, which impacts the open circuit voltage. Affordable production of the state-of-the-art silicon-based photovoltaics is limited by a need for large-area silicon substrates with low electronic defect densities.[5] Thin-film organic photovoltaics (OPVs) offer the potential to be fabricated at low cost over virtually any size substrate due to their solution processability.[6] OPVs have achieved power conversion efficiencies of near 8%, which is close to the estimated efficiencies of 10% needed to achieve economic viability,[6, 7] and are currently limited by their coverage of the solar spectrum [8] and by optoelectronic loss processes in the cells.[7, 9] Significant effort has been directed towards improving their efficiency through the synthesis of new materials [7] and by the development of a fundamental understanding the nature of charge carrier generation and loss.[10]