量子ドットー有機分子複合系におけるアップコンバージョン機構に基づく太陽電池

建立了一个基于有机分子和无机量子点复合材料的三重态-三重态湮灭光子上转换（TTA-UC）体系。将5-（4-羧基苯基）-10,15,20-三苯基卟啉（TPP）分子组装在PbS量子点表面，将近红外（NIR）上转换为可见光。在UC过程中，PbS量子点被激光脉冲激发，并进行界面三重态能量传递到表面附着的TPP，产生处于三重态激发态的TPP （TPP (T1)）。然后从TPP （T1）到溶解在溶液中的2,5,8,11-四叔丁基苝（TTBP）分子发生连续的TTET， TTBP充当湮灭剂。然后，两个TTBP （T1）经过TTA-UC产生一个单重态，发射出更高能量的光子。

I established a triplet-triplet annihilation photon upconversion (TTA-UC) system based the composites of organic molecules and inorganic quantum dots (QDs). 5-(4-Carboxyphenyl)-10,15,20-triphenylporphyrin (TPP) molecules were assembled on the surface of PbS QDs for upconverting near infrared (NIR) into visible light. During UC process, PbS QDs are excited by a laser pulse and engages in interfacial triplet energy transfer to surface-attached TPP to generate TPP in the triplet excited state (TPP (T1)). Successive TTET then occurs from TPP (T1) to 2,5,8,11-tetra-tert-butylperylene (TTBP) molecules dissolved in the solution, which act as an annihilator. Then, two TTBP (T1) undergo TTA-UC to produce a singlet that emits a higher-energy photon.