Naslov
Ge quantuum wires in alumina matrix for enhanced photoelectric conversion

Autori
Tkalcevic, Marija ; Boršćak, Denis ; Periša, Ivana ; Šarić, Iva ; Bernstorff, Siegrid ; Mičetić, Maja

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Znanstvena škola o okolišu 2022 - Multidisciplinarni pristup istraživanju mikro- i nano- čestica u prirodnim sustavima : knjiga sažetaka / Ivanić, Maja ; Fiket, Željka ; Furdek Turk, Martina ; Vdović, Neda - Zagreb, 2022, 13-13

ISBN
978-953-7941-45-1

Skup
Znanstvena škola o okolišu 2022, Multidisciplinarni pristup istraživanju mikro i nano čestica u prirodnim sustavima

Mjesto i datum
Zagreb, Hrvatska, 22.11.2022. - 25.11.2022

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Ge QWs ; solar cells ; thin films ; GISAXS ; multiple exciton generation

Sažetak
Thin films containing 3D-ordered semiconductor quantum wires offer a great tool to improve the properties of photo-sensitive devices. The films were prepared using nitrogen-assisted magnetron sputtering co-deposition of Ge and alumina. We demonstrate a strong photocurrent generation in the films, much stronger than in similar films containing Ge quantum dots. The enhanced photogeneration is the consequence of the produced multiple exciton generation in the films and of their specific structure consisting of the interconnected Ge quantum wires that enable efficient transport of carriers.The bandgap value depends on the geometrical properties of the quantum wires, and it is close to the maximum of the solar irradiance in this case. In addition, we show that the multiple exciton generation is the most pronounced at the photon energy values that are equal to multiple values of the thin film band gap.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Interdisciplinarne prirodne znanosti, Interdisciplinarne tehničke znanosti

POVEZANOST RADA