Shapiro B I, Nekrasov A D, Krivobok V S, Lebedev V S
Opt Express. 2018 Nov 12;26(23):30324-30337. doi: 10.1364/OE.26.030324.
We report results of experimental studies of the photoabsorption, photoluminescent and photoelectric properties of a new type of multilayer molecular nanocrystals, consisting of highly ordered J-aggregates of one anionic and two cationic J-aggregates of cyanine dyes. In contrast to conventional J-aggregated dyes the multichromic nanocrystals synthesized in this work, are capable of efficient light absorption in three excitonic bands of the visible and near-IR spectral ranges. The spectral peak positions in the absorption bands can be controlled by appropriately selecting a set of dyes a molecular crystal is made of. Our investigations of the photoelectric properties of multichromic crystals have shown that each of them can potentially be used as a photosensitive layer of a photocell with photoconductivity in three peaks of excitonic absorption. The synthesized nanocrystals are attractive for the creation of thin-film organic photodetectors with a large photosensitive area and varied photoabsorption spectra, excitonic waveguides and for some other applications in organic and hybrid photonics and optoelectronics.
我们报告了一种新型多层分子纳米晶体的光吸收、光致发光和光电特性的实验研究结果，该纳米晶体由一种阴离子菁染料的高度有序J聚集体和两种阳离子菁染料的J聚集体组成。与传统的J聚集染料不同，这项工作中合成的多色纳米晶体能够在可见光和近红外光谱范围的三个激子带中高效吸收光。吸收带中的光谱峰值位置可以通过适当选择构成分子晶体的一组染料来控制。我们对多色晶体光电特性的研究表明，它们中的每一种都有可能用作光电池的光敏层，在激子吸收的三个峰值处具有光电导性。合成的纳米晶体对于制造具有大光敏面积和多样光吸收光谱的薄膜有机光电探测器、激子波导以及在有机和混合光子学与光电子学中的其他一些应用具有吸引力。
