Open AccessInkjet-printed perovskite distributed feedback lasers
Author(s) -
Florian Mathies,
Philipp Brenner,
Gerardo HernandezSosa,
Ian A. Howard,
Ulrich W. Paetzold,
Uli Lemmer
Publication year - 2018
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.00a144
Subject(s) - lasing threshold , materials science , perovskite (structure) , optoelectronics , laser , optics , inkwell , layer (electronics) , polyethylene terephthalate , active layer , laser linewidth , nanotechnology , thin film transistor , composite material , wavelength , physics , chemical engineering , engineering
We report on digitally printed distributed feedback lasers on flexible polyethylene terephthalate substrates based on methylammonium lead iodide perovskite gain material. The perovskite lasers are printed with a digital drop-on-demand inkjet printer, providing full freedom in the shape and design of the gain layer. We show that adjusting the perovskite ink increases the potential processing window and decreases the surface roughness of the active layer to less than 7 nm, which is essential for low lasing thresholds. Prototype inkjet-printed perovskite lasers processed on top of nanopatterned rigid as well as flexible substrates are demonstrated. Optimized perovskite gain layers printed on PET substrates demonstrated lasing and showed a linewidth of 0.4 nm and a lasing threshold of 270 kW/cm 2 . In addition, printing of a distinct shape shows a high level of uniformity, demonstrated by a low spatial resolved full width half maximum variation over the whole printing area. These results reveal the possibilities of digital printed perovskite layers towards large-scale and low-cost laser applications of arbitrary shape.