A generic interface to reduce the efficiency-stability-cost gap of perovskite solar cells
A generic interface to reduce the efficiency-stability-cost gap of perovskite solar cells
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DOI：
10.1126/science.aao5561
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发表时间：
2017-12-01
期刊：
影响因子：
56.9
通讯作者：
Brabec, Christoph J.
中科院分区：
文献类型：
--
作者：
Hou, Yi;Du, Xiaoyan;Brabec, Christoph J.
延迟基于混合有机卤化物铅钙钛矿的薄膜太阳能电池的进一步商业化的主要瓶颈是现有技术设备中的界面损失。我们提出了一种通用的接口架构，该架构结合了溶液处理的，可靠的和具有成本效益的空穴传输材料，而不会影响钙钛矿太阳能电池的效率，稳定性或可扩展性。钽掺杂氧化钨（Ta-WOx）/共轭聚合物多层膜提供了令人惊讶的小界面势垒，并与各种可扩展的共轭聚合物形成普遍的准欧姆接触。在一个具有规则平面结构和自组装单层的简单器件中，Ta-WOx掺杂界面基钙钛矿太阳能电池实现了21.2%的最大效率，并提供了超过1000小时的光稳定性。通过消除额外的离子掺杂剂，这些发现开辟了整个有机物类别，作为钙钛矿太阳能电池的可扩展空穴传输材料。
A major bottleneck delaying the further commercialization of thin-film solar cells based on hybrid organohalide lead perovskites is interface loss in state-of-the-art devices. We present a generic interface architecture that combines solution-processed, reliable, and cost-efficient hole-transporting materials without compromising efficiency, stability, or scalability of perovskite solar cells. Tantalum-doped tungsten oxide (Ta-WOx)/conjugated polymer multilayers offer a surprisingly small interface barrier and form quasi-ohmic contacts universally with various scalable conjugated polymers. In a simple device with regular planar architecture and a self-assembled monolayer, Ta-WOx-doped interface-based perovskite solar cells achieve maximum efficiencies of 21.2% and offer more than 1000 hours of light stability. By eliminating additional ionic dopants, these findings open up the entire class of organics as scalable hole-transporting materials for perovskite solar cells.