Photocurrent Enhancement from Solid-State Triplet–Triplet Annihilation Upconversion of Low-Intensity, Low-Energy Photons

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• 作者：Chuanhao Li ; Christopher Koenigsmann ; Fan Deng ; Anna Hagstrom ; Charles A. Schmuttenmaer ; Jae-Hong Kim
• 刊名：ACS Photonics
• 出版年：2016
• 出版时间：May 18, 2016
• 年：2016
• 卷：3
• 期：5
• 页码：784-790
• 全文大小：551K
• 年卷期：0
• ISSN：2330-4022

文摘

We present a red-to-blue upconversion system based on triplet–triplet annihilation in a solid-state film configuration that significantly enhances the photocurrent of a model solar cell device. The film is robust against oxygen quenching and can be readily tailored to existing solar cell architectures. The photovoltaic performance of upconversion-assisted dye-sensitized photoelectrochemical cells was measured under both high-power coherent laser and low-power incoherent light irradiation (light-emitting diode and simulated AM1.5G sunlight). By utilizing low-energy photons that would otherwise be wasted, the photocurrent is enhanced by as much as 35% under one-sun light intensity when a model solar cell device is coupled with a TTA film and a reflector.