Color-tuned and transparent colloidal quantum dot solar cells via optimized multilayer interference
Color-tuned and transparent colloidal quantum dot solar cells via optimized multilayer interference
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DOI：
10.1364/oe.25.00a101
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发表时间：
2017-02-20
期刊：
影响因子：
3.8
通讯作者：
Thon, Susanna M.
中科院分区：
文献类型：
--
作者：
Arinze, Ebuka S.;Qiu, Botong;Thon, Susanna M.
胶体量子点（CQDs）由于其带隙可调性、近红外响应性和基于溶液的加工灵活性，是实现彩色和半透明太阳能电池的有前途的候选材料。CQD太阳能电池通常由几个光学薄的活性层和电极层组成，这些层针对其电性能进行了优化；然而，在CQD层本身的吸收开始之外，它们的光谱可调性相对尚未被探索。在本研究中，我们利用薄膜干涉工程的方法设计、优化和制造了多色透明CQD器件。我们开发了一种优化算法来生产具有可控颜色特性的器件。我们量化了可获得的颜色或透明度与可用光电流之间的权衡，计算了非理想干涉图案对器件表观颜色的影响，并将我们的优化方法应用于串联太阳能电池设计。实验上，我们制作了蓝色、绿色、黄色、红色和半透明器件，并实现了彩色器件的光电流范围为10至15.2 mA/cm(2)。我们展示了平均可见透明度为27%至32%的半透明器件，与我们的设计模拟结果相匹配。我们讨论了我们的优化方法如何为具有任意光谱轮廓的光电器件的定制设计提供一个通用平台。(C) 2017年美国光学学会
Colloidal quantum dots (CQDs), are a promising candidate material for realizing colored and semitransparent solar cells, due to their band gap tunability, near infrared responsivity and solution-based processing flexibility. CQD solar cells are typically comprised of several optically thin active and electrode layers that are optimized for their electrical properties; however, their spectral tunability beyond the absorption onset of the CQD layer itself has been relatively unexplored. In this study, we design, optimize and fabricate multicolored and transparent CQD devices by means of thin film interference engineering. We develop an optimization algorithm to produce devices with controlled color characteristics. We quantify the tradeoffs between attainable color or transparency and available photocurrent, calculate the effects of non-ideal interference patterns on apparent device color, and apply our optimization method to tandem solar cell design. Experimentally, we fabricate blue, green, yellow, red and semitransparent devices and achieve photocurrents ranging from 10 to 15.2 mA/cm(2) for the colored devices. We demonstrate semitransparent devices with average visible transparencies ranging from 27% to 32%, which match our design simulation results. We discuss how our optimization method provides a general platform for custom-design of optoelectronic devices with arbitrary spectral profiles. (C) 2017 Optical Society of America