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Triplet-triplet annihilation based near infrared to visible molecular photon upconversion.
Chemical Society Reviews ( IF 40.4 ) Pub Date : 2020-09-03 , DOI: 10.1039/d0cs00257g
Pankaj Bharmoria 1 , Hakan Bildirir , Kasper Moth-Poulsen
Affiliation  

Triplet–triplet annihilation based molecular photon upconversion (TTA-UC) is an exciting research area for a broad range of photonic applications due to its tunable spectral range and possible operation at non-coherent solar irradiance. Most of the TTA-UC studies are limited to Visible to Visible (Vis to Vis) energy upconversion. However, for several practical photonic applications, efficient near infrared (NIR) to Vis upconversion is preferred. Examples include, (i) photovoltaics where TTA-UC could lead to utilization of a larger part of the solar spectrum and (ii) in NIR stimulated biological applications where the deep penetration and non-invasive nature of NIR light coupled to TTA-UC offers new opportunities. Although, NIR to Vis TTA-UC is known since 2007, the recent five years have witnessed quite a progress in terms of the development of new chromophores, hybrid systems and fabrication techniques to increase the UC quantum yield at low excitation intensity. With this tutorial review we are reviewing recent progress, identifying existing challenges and discus possible future directions and opportunities.

中文翻译:

三重态-三重态an灭基于近红外到可见分子的光子上转换。

基于三重态-三重态an灭的分子光子上转换(TTA-UC)由于其可调节的光谱范围和在非相干太阳辐照下的可能工作而成为广泛的光子应用领域中令人兴奋的研究领域。大多数TTA-UC研究仅限于可见到可见(Vis到Vis)能量上转换。然而,对于几种实际的光子应用,优选将有效的近红外(NIR)转换为Vis上转换的方法。示例包括:(i)TTA-UC可能导致利用大部分太阳光谱的光伏发电;(ii)NIR刺激的生物应用中,与TTA-UC耦合的NIR光的深层穿透和非侵入性提供了新的机会。尽管自2007年以来,Vis TTA-UC的NIR已广为人知,在最近的五年中,在开发新的生色团,混合系统和制造技术以提高低激发强度下的UC量子产率方面取得了长足的进步。通过本教程的回顾,我们将回顾最近的进展,确定存在的挑战并讨论未来可能的方向和机会。
更新日期:2020-09-21
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