RT Journal Article
SR Electronic
T1 Confining metal-halide perovskites in nanoporous thin films
JF Science Advances
JO Sci Adv
FD American Association for the Advancement of Science
SP e1700738
DO 10.1126/sciadv.1700738
VO 3
IS 8
A1 Demchyshyn, Stepan
A1 Roemer, Janina Melanie
A1 Groiß, Heiko
A1 Heilbrunner, Herwig
A1 Ulbricht, Christoph
A1 Apaydin, Dogukan
A1 Böhm, Anton
A1 Rütt, Uta
A1 Bertram, Florian
A1 Hesser, Günter
A1 Scharber, Markus Clark
A1 Sariciftci, Niyazi Serdar
A1 Nickel, Bert
A1 Bauer, Siegfried
A1 Głowacki, Eric Daniel
A1 Kaltenbrunner, Martin
YR 2017
UL http://advances.sciencemag.org/content/3/8/e1700738.abstract
AB Controlling the size and shape of semiconducting nanocrystals advances nanoelectronics and photonics. Quantum-confined, inexpensive, solution-derived metal halide perovskites offer narrowband, color-pure emitters as integral parts of next-generation displays and optoelectronic devices. We use nanoporous silicon and alumina thin films as templates for the growth of perovskite nanocrystallites directly within device-relevant architectures without the use of colloidal stabilization. We find significantly blue-shifted photoluminescence emission by reducing the pore size; normally infrared-emitting materials become visibly red, and green-emitting materials become cyan and blue. Confining perovskite nanocrystals within porous oxide thin films drastically increases photoluminescence stability because the templates auspiciously serve as encapsulation. We quantify the template-induced size of the perovskite crystals in nanoporous silicon with microfocus high-energy x-ray depth profiling in transmission geometry, verifying the growth of perovskite nanocrystals throughout the entire thickness of the nanoporous films. Low-voltage electroluminescent diodes with narrow, blue-shifted emission fabricated from nanocrystalline perovskites grown in embedded nanoporous alumina thin films substantiate our general concept for next-generation photonic devices.