Solution-Phase Synthesis of SnSe Nanocrystals for Use in Solar Cells
Solution-Phase Synthesis of SnSe Nanocrystals for Use in Solar Cells
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DOI：
10.1021/ja100249m
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发表时间：
2010-03-31
影响因子：
15
通讯作者：
Brutchey, Richard L.
中科院分区：
文献类型：
--
作者：
Franzman, Matthew A.;Schlenker, Cody W.;Brutchey, Richard L.
采用化学计量量的二硒二叔丁基作为新型易溶硒源，通过液相法合成了相纯硒化锡（SnSe）纳米晶体。所得纳米晶体的直接带隙（E-g = 1.71 eV）相对于体积值（E-g = 1.30 eV）发生了显著的蓝移，这可能是由于纳米晶体的平均直径相对较小（mu(D) < 20 nm）而导致的量子限制的结果。初步的太阳能电池器件将SnSe纳米晶体结合到聚[2-甲氧基-5-（3',7'-二甲基辛基）-1,4-苯基乙烯]基质中，显示出量子效率和短路电流密度的显著提高，表明这种地球上丰富的材料可能是未来光伏器件中有价值的组件。
Nanocrystals of phase-pure tin(II) selenide (SnSe) were synthesized via a solution-phase route employing stoichiometric amounts of di-tert-butyl diselenide as a novel and facile selenium source. The direct band gap of the resulting nanocrystals (E-g = 1.71 eV) is significantly blue-shifted relative to the bulk value (E-g = 1.30 eV), a likely consequence of quantum confinement resulting from the relatively small average diameter of the nanocrystals (mu(D) < 20 nm). Preliminary solar cell devices incorporating SnSe nanocrystals into a poly[2-methoxy-5-(3',7'-dimethyloctyloxy)-1,4-phenylenevinylene] matrix demonstrate a significant enhancement in quantum efficiency and short-circuit current density, suggesting that this earth-abundant material could be a valuable component in future photovoltaic devices.