Disorder and Confinement Effects to Tune the Optical Properties of Amino Acid Doped Cu2O Crystals

被引：8

作者：

Kurashvili, Mariam ^{[1
,2
]}

Polishchuk, Iryna ^{[3
,4
]}

Lang, Arad ^{[3
,4
]}

Strohmair, Simone ^{[1
,2
]}

Richter, Alexander F. ^{[1
,2
]}

Rieger, Sebastian ^{[1
,2
]}

Debnath, Tushar ^{[1
,2
]}

Pokroy, Boaz ^{[3
,4
,5
]}

Feldmann, Jochen ^{[1
,2
]}

机构：

[1] Ludwig Maximilians Univ LMU, Nanoinst Munich, Chair Photon & Optoelect, Koniginstr 10, D-80539 Munich, Germany

[2] Ludwig Maximilians Univ LMU, Dept Phys, Koniginstr 10, D-80539 Munich, Germany

[3] Technion Israel Inst Technol, Dept Mat Sci & Engn, IL-32000 Haifa, Israel

[4] Technion Israel Inst Technol, Russell Berrie Nanotechnol Inst, IL-32000 Haifa, Israel

[5] Technion Israel Inst Technol, Nancy & Stephen Grand Technion Energy Program, IL-3200003 Haifa, Israel

来源：

ADVANCED FUNCTIONAL MATERIALS | 2022年 / 32卷 / 27期

关键词：

amino acid doped Cu; O-2; bandgap distribution; disorder; optical properties; quantum confinement; RAMAN-SCATTERING; EXCITONS; LUMINESCENCE; OXIDE; PHOTOLUMINESCENCE; CALCITE;

D O I：

10.1002/adfm.202202121

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Biominerals are organic-inorganic nanocomposites exhibiting remarkable properties due to their unique configuration. Using optical spectroscopy and theoretical modeling, it is shown that the optical properties of a model bioinspired system, an inorganic semiconductor host (Cu2O) grown in the presence of amino acids (AAs), are strongly influenced by the latter. The absorption and photoluminescence excitation spectra of Cu2O-AAs blue-shift with growing AA content, indicating band gap widening. This is attributed to the void-induced quantum confinement effects. Surprisingly, no such shift occurs in the emission spectra. The theoretical model, assuming an inhomogeneous AA distribution within Cu2O-AAs due to compositional disorder, explains the deviating behavior of the photoluminescence. The model predicts that the potential causing the confinement effects becomes a function of the local AA density. It results in a Gaussian band gap distribution that shapes the optical properties of Cu2O-AAs. Imitating and harnessing the process of biomineralization can pave the way toward new functional materials.

引用

页数：7

共 41 条

[1] Chlorine doping of Cu2O [J].