期刊
NANO LETTERS
卷 13, 期 7, 页码 3124-3128出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl401044q
关键词
Perovskite; fullerene; hybrid photovoltaics; self-assembled monolayer; photoinduced absorption; photoluminescence
类别
资金
- Engineering and Physical Sciences Research Council (EPSRC)
- European Research Council (ERC-StG HYPER Project) [279881]
- European Community [246124]
- Worcester College, Oxford
- European Research Council (ERC) [279881] Funding Source: European Research Council (ERC)
A plethora of solution-processed materials have been developed for solar cell applications. Hybrid solar cells based on light absorbing semiconducting polymers infiltrated into mesoporous TiO2 are an interesting concept, but generating charge at the polymermetal oxide heterojunction is challenging. Metalorganic perovskite absorbers have recently shown remarkable efficiencies but currently lack the range of color tunability of organics. Here, we have combined a fullerene self-assembled monolayer (C(60)SAM) functionalized mesoporous titania, a perovskite absorber (CH3NH3PbI3xClx), and a light absorbing polymer hole-conductor, P3HT, to realize a 6.7% efficient hybrid solar cell. We find that photoexcitations in both the perovskite and the polymer undergo very efficient electron transfer to the C(60)SAM. The C(60)SAM acts as an electron acceptor but inhibits further electron transfer into the TiO2 mesostructure due to energy level misalignment and poor electronic coupling. Thermalized electrons from the C(60)SAM are then transported through the perovskite phase. This strategy allows a reduction of energy loss, while still employing a mesoporous electron acceptor, representing an exciting and versatile route forward for hybrid photovoltaics incorporating light-absorbing polymers. Finally, we show that we can use the C(60)SAM functionalization of mesoporous TiO2 to achieve an 11.7% perovskite-sensitized solar cell using Spiro-OMeTAD as a transparent hole transporter.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据