High efficiency deep red to yellow photochemical upconversion under solar irradiance,Energy & Environmental Science

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High efficiency deep red to yellow photochemical upconversion under solar irradiance
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2021-09-09 , DOI: 10.1039/d1ee02197d
Joseph K. Gallaher ₁ , Katherine M. Wright ₂ , Laszlo Frazer _{1,

3} , Rowan W. MacQueen _{1,

4} , Maxwell J. Crossley ₅ , Felix N. Castellano ₂ , Timothy W. Schmidt ₁

Affiliation

The performance of a perylene monoimide annihilator is evaluated in a photochemical upconversion composition. It is found to perform up to five times better than the commonly employed rubrene annihilator at low excitation intensity, but suffers from a low annihilation singlet yield which hinders its performance under strong excitation. Upconversion action spectroscopy under broadband bias reveals that under one sun illumination, an upconversion composition employing the perylene monoimide utilizes more than 12% of the generated triplet states to generate emissive, excited singlet states. In a suitable medium, this composition could enhance the energy conversion efficiency of high band gap solar cells.

中文翻译：

太阳辐照下高效深红至黄光化学上转换

在光化学上转换组合物中评估苝单酰亚胺湮灭剂的性能。发现它在低激发强度下的性能比常用的红荧烯湮灭剂高五倍，但其湮没单线态产率低，这阻碍了其在强激发下的性能。宽带偏压下的上转换作用光谱表明，在一次阳光照射下，采用苝单酰亚胺的上转换组合物利用超过 12% 的生成三线态来生成发射、激发单线态。在合适的介质中，这种组合物可以提高高带隙太阳能电池的能量转换效率。

更新日期：2021-09-15

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