Tailoring of a visible-light-absorbing biaxial ferroelectric towards broadband self-driven photodetection

被引：125

作者：

Han, Shiguo ^{[1
,2
,3
]}

Li, Maofan ^{[1
,2
]}

Liu, Yi ^{[1
,2
,3
]}

Guo, Wuqian ^{[1
,2
,3
]}

Hong, Mao-Chun ^{[1
,2
]}

Sun, Zhihua ^{[1
,2
]}

Luo, Junhua ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Fujian Inst Res Struct Matter, State Key Lab Struct Chem, 155 Yangqiao West Rd, Fuzhou 350002, Fujian, Peoples R China

[2] Fujian Sci & Technol Innovat Lab Optoelect Inform, 155 Yangqiao West Rd, Fuzhou 350002, Fujian, Peoples R China

[3] Chinese Acad Sci, Univ Chinese Acad Sci, 19 A Yuquan Rd, Beijing 100039, Peoples R China

来源：

NATURE COMMUNICATIONS | 2021年 / 12卷 / 01期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1038/s41467-020-20530-4

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

In terms of strong light-polarization coupling, ferroelectric materials with bulk photovoltaic effects afford a promising avenue for optoelectronic devices. However, due to severe polarization deterioration caused by leakage current of photoexcited carriers, most of ferroelectrics are merely capable of absorbing 8-20% of visible-light spectra. Ferroelectrics with the narrow bandgap (<2.0eV) are still scarce, hindering their practical applications. Here, we present a lead-iodide hybrid biaxial ferroelectric, (isopentylammonium)(2)(ethylammonium)(2)Pb3I10, which shows large spontaneous polarization (similar to 5.2 mu C/cm(2)) and a narrow direct bandgap (similar to 1.80eV). Particularly, the symmetry breaking of 4/mmmFmm2 species results in its biaxial attributes, which has four equivalent polar directions. Accordingly, exceptional in-plane photovoltaic effects are exploited along the crystallographic [001] and [010] axes directions inside the crystallographic bc-plane. The coupling between ferroelectricity and photovoltaic effects endows great possibility toward self-driven photodetection. This study sheds light on future optoelectronic device applications.

引用

页数：9