Abstract
Hybrid perovskites are promising semiconductors for optoelectronic applications. However, they suffer from morphological disorder that limits their optoelectronic properties and, ultimately, device performance. Recently, perovskite single crystals have been shown to overcome this problem and exhibit impressive improvements: low trap density, low intrinsic carrier concentration, high mobility, and long diffusion length that outperform perovskite-based thin films. These characteristics make the material ideal for realizing photodetection that is simultaneously fast and sensitive; unfortunately, these macroscopic single crystals cannot be grown on a planar substrate, curtailing their potential for optoelectronic integration. Here we produce large-area planar-integrated films made up of large perovskite single crystals. These crystalline films exhibit mobility and diffusion length comparable with those of single crystals. Using this technique, we produced a high-performance light detector showing high gain (above 10 4 electrons per photon) and high gain-bandwidth product (above 10 8 Hz) relative to other perovskite-based optical sensors.
| Original language | English (US) |
|---|---|
| Article number | 8724 |
| Journal | Nature communications |
| Volume | 6 |
| DOIs | |
| State | Published - Nov 9 2015 |
Funding
We thank N. Kherani, B. Ramautarsingh, A. Flood and P. O\u2019Brien for the use of the Hall setup; and D. Kopilovic for technical assistance and guidance. We acknowledge the support of Awards URF/1/2268-01-01, URF/1/1741-01-01 and URF/1/1373-01-01 made by King Abdullah University of Science and Technology (O.M.B.) and award KUS-11-009-21, the Ontario Research Fund Research Excellence Program and the Natural Sciences and Engineering Research Council of Canada (E.H.S.).
ASJC Scopus subject areas
- General Chemistry
- General Biochemistry, Genetics and Molecular Biology
- General Physics and Astronomy
