One step facile synthesis of a novel anthanthrone dye-based, dopant-free hole transporting material for efficient and stable perovskite solar cells
One step facile synthesis of a novel anthanthrone dye-based, dopant-free hole transporting material for efficient and stable perovskite solar cells
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DOI：
10.1039/c7tc05238c
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发表时间：
2018-04-14
影响因子：
6.4
通讯作者：
Sonar, Prashant
中科院分区：
文献类型：
--
作者：
Hong Duc Pham;Hayasake, Kazuma;Sonar, Prashant
钙钛矿太阳能电池(PSCs)技术在太阳能电池界产生了巨大的影响，因为PSCs的卓越性能，在过去几年中，其功率转换效率(PCE)飙升至22%的世界纪录。尽管有如此高的效率价值，但由于器件在环境大气条件下的稳定性较低，以及这些器件中用作电荷传输层的空穴传输材料(HTMS)的成本非常高，以负担得起的价格实现大面积应用的PSCs的商业化仍然悬而未决。为了应对这些挑战，使用廉价的HTMS可以起到双重作用，既可以降低钙钛矿技术的整体成本，又可以保护钙钛矿层，以实现更高的稳定性。为了实现这些目标，人们提出了各种新型有机空穴传输材料(HTMS)。在这项研究中，我们使用了一种独特而新颖的蒽酮(ANT)染料作为共轭核心构筑块和一个负担得起的部分来合成一种新的HTM。用扩展的二苯胺(DPA)末端封端基团对商用染料进行官能化。采用一步法合成了DPA-ANT-DPA，并成功地将其应用于介孔钙钛矿太阳能电池器件中，在1Sun条件下获得了11.5%的PCE，且具有良好的稳定性。与其他D-A-D分子设计和低带隙器件相比，所获得的器件效率是最高的之一。这种基于廉价起始前驱体的低成本HTM为经济和大规模生产稳定的钙钛矿型太阳能电池铺平了道路。
Perovskite solar cell (PSCs) technology has made a tremendous impact in the solar cell community due to the exceptional performance of PSCs as the power conversion efficiency (PCE) surged to a world record of 22% within the last few years. Despite this high efficiency value, the commercialization of PSCs for large area applications at affordable prices is still pending due to the low stability of the devices under ambient atmospheric conditions and the very high cost of the hole transporting materials (HTMs) used as the charge transporting layer in these devices. To cope with these challenges, the use of cheap HTMs can play a dual role in terms of lowering the overall cost of perovskite technology as well as protecting the perovskite layer to achieve a higher stability. To achieve these goals, various new organic hole transporting materials (HTMs) have been proposed. In this study, we used a unique and novel anthanthrone (ANT) dye as a conjugated core building block and an affordable moiety to synthesize a new HTM. The commercially available dye was functionalized with an extended diphenylamine (DPA) end capping group. The newly developed HTM, named DPA-ANT-DPA, was synthesized in a single step and used successfully in mesoporous perovskite solar cell devices, achieving a PCE of 11.5% under 1 Sun condition with impressive stability. The obtained device efficiency is amongst the highest as compared to that of other D-A-D molecular design and low band gap devices. This kind of low cost HTM based on an inexpensive starting precursor, anthanthrone dye, paves the way for the economical and large-scale production of stable perovskite solar cells.