Reineck Philipp, Brick Delia, Mulvaney Paul, Bach Udo
Department of Materials Engineering, Monash University , Clayton, Victoria 3800, Australia.
School of Chemistry & Bio21 Institute, University of Melbourne , Parkville, Victoria 3010, Australia.
J Phys Chem Lett. 2016 Oct 20;7(20):4137-4141. doi: 10.1021/acs.jpclett.6b01884. Epub 2016 Oct 5.
Gold nanoparticles located at a metal oxide/hole conductor interface generate photocurrents upon visible light illumination. We demonstrate that the quantum efficiency of this process depends on the nanoparticle size. Gold nanoparticles (5 nm) show a maximum absorbed photon-to-electron conversion efficiency (APCE) of 13.3%. For increasing particle sizes, the average APCE decreases to 3.3% for the largest particles (40 nm) investigated. Three possible causes for this efficiency change are discussed.
位于金属氧化物/空穴导体界面的金纳米颗粒在可见光照射下会产生光电流。我们证明了这一过程的量子效率取决于纳米颗粒的尺寸。金纳米颗粒（5纳米）的最大吸收光子到电子转换效率（APCE）为13.3%。对于粒径增加的情况，在所研究的最大颗粒（40纳米）中，平均APCE降至3.3%。文中讨论了导致这种效率变化的三种可能原因。
