Monolithic Organic/Colloidal Quantum Dot Hybrid Tandem Solar Cells via Buffer Engineering.,Advanced Materials

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Monolithic Organic/Colloidal Quantum Dot Hybrid Tandem Solar Cells via Buffer Engineering.
Advanced Materials ( IF 27.4 ) Pub Date : 2020-09-16 , DOI: 10.1002/adma.202004657
Hong Il Kim _{1,

2} , Se-Woong Baek ₃ , Min-Jae Choi ₁ , Bin Chen ₁ , Olivier Ouellette ₁ , Kyoungwon Choi ₂ , Benjamin Scheffel ₁ , Hyuntae Choi ₂ , Margherita Biondi ₁ , Sjoerd Hoogland ₁ , F Pelayo García de Arquer ₁ , Taiho Park ₂ , Edward H Sargent ₁

Affiliation

Monolithically integrated hybrid tandem solar cells (TSCs) that combine solution‐processed colloidal quantum dot (CQD) and organic molecules are a promising device architecture, able to complement the absorption across the visible to the infrared. However, the performance of organic/CQD hybrid TSCs has not yet surpassed that of single‐junction CQD solar cells. Here, a strategic optical structure is devised to overcome the prior performance limit of hybrid TSCs by employing a multibuffer layer and a dual near‐infrared (NIR) absorber. In particular, a multibuffer layer is introduced to solve the problem of the CQD solvent penetrating the underlying organic layer. In addition, the matching current of monolithic TSCs is significantly improved to 15.2 mA cm⁻² by using a dual NIR organic absorber that complements the absorption of CQD. The hybrid TSCs reach a power conversion efficiency (PCE) of 13.7%, higher than that of the corresponding individual single‐junction cells, representing the highest efficiency reported to date for CQD‐based hybrid TSCs.

中文翻译：

通过缓冲工程的单片有机/胶体量子点混合串联太阳能电池。

结合溶液处理的胶体量子点（CQD）和有机分子的单片集成混合串联太阳能电池（TSC）是一种很有前途的设备架构，能够补充对可见光的吸收。但是，有机/ CQD混合TSC的性能尚未超过单结CQD太阳能电池的性能。在这里，设计了一种战略性的光学结构，以通过使用多缓冲层和双近红外（NIR）吸收器来克服混合型TSC的现有性能限制。特别地，引入多缓冲层以解决CQD溶剂穿透下面的有机层的问题。此外，单片TSC的匹配电流显着提高到15.2 mA cm ^-2通过使用双NIR有机吸收剂来补充CQD的吸收。混合型TSC的功率转换效率（PCE）为13.7％，高于相应的单个单结电池的功率转换效率，这是迄今为止报道的基于CQD的混合型TSC的最高效率。

更新日期：2020-10-20

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