期刊
APPLIED PHYSICS LETTERS
卷 114, 期 13, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.5092646
关键词
-
资金
- National Natural Science Foundation of China [51872135, 51572121, 21603098, 21633004]
- Natural Science Foundation of Jiangsu Province [BK20151265, BK20151383, BK20150580]
- Fundamental Research Funds for the Central Universities [021314380133, 021314380084]
Tantalum nitride (Ta3N5) is one of the most promising photoresponsive semiconductor materials for efficient solar energy conversion, but its fast carrier recombination has hindered research progress severely. Fabricating a heterojunction structure is an effective strategy to promote the charge separation efficiency and thus enhance solar conversion efficiency. Herein, we designed a p-n heterojunction photoanode consisting of n-type Ta3N5 nanorod arrays (NRAs) that grew along the a-axis (light electron effective mass) and p-type Cu2O nanoparticles. This NRA heterojunction shortens the hole diffusion distance, transfers electrons along the a-axis effectively, and enlarges the space charge region. The heterojunction improves the charge separation efficiency of Ta3N5 NRAs significantly, and Ta3N5-Cu2O exhibits a photocurrent density of 9.19 mA cm(-2) at 1.6 V vs normal hydrogen electrode (V-NHE, pH = 0), an onset potential of 0.326 V-NHE, and a maximum incident photon to current efficiency of 60% at 380 nm. Our results demonstrated a potential crystal oriented growth strategy of nanostructured heterojunctions for overcoming the short carrier diffusion distance and fast carrier recombination. Published under license by AIP Publishing.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据