High-Performance Chlorophyll-B/Si Nanowire Heterostructure For Self-Biasing Bioinorganic Hybrid Photodetectors
ACS APPLIED NANO MATERIALS(2021)
摘要
As one kind of ecofriendly organic semiconductor materials, chlorophyll has attracted great attention with useful optical properties. Although pigments such as chlorophyll-a (Chl-a) are explored widely, chlorophyll-b (Chl-b) is rarely studied even though it possesses outstanding optical properties with impressive stability. Here, Chl-b is extracted from spinach leaves using a very simple and cost-effective method to study its potential use on Si nanowire (NW) heterostructures having volume concentration varying from 0 to 6%. In comparison to the control Si NW device, the Chl-b/SiNW heterostructure exhibits superior optoelectronic performances including high on/off ratio (similar to 103), good external quantum efficiency (similar to 208%), high responsivity (similar to 0.73 A/W), improved detectivity (similar to 2.2 x 10(12) Jones), and relatively faster response time (<1 s) under 435 nm illumination. In addition, it offers quite promising values of the abovementioned figure of merits of a photodetector over the wide spectral range from 350-1100 nm. This low-cost and high-sensitivity Chl-b/SiNW heterostructure device thus opens up challenging research possibilities for green energy conversion and biophotonic applications on Si-compatible complementary metal-oxide-semiconductor platforms.
更多查看译文
关键词
chlorophyll-b, bioinorganic hybrid photodetector, EQE, responsivity, detectivity, green energy, Si nanowire
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要