Wannier-Stark ladder conditions in 4H-SiC p-n junctions grown on off axis substrates
2006 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 89, no 23, 233508- p.Article in journal (Refereed) Published
4H-SiC p+ - n- - n+ junctions have been prepared on 8° off oriented plane aiming to investigate conditions of Wannier-Stark localization (WSL), and respectively the occurrence of a negative temperature coefficient of avalanche breakdown voltage (TCABV). A method is proposed that can enable obtaining important results without reaching the regime of destructive avalanche breakdown. By analyzing the photocurrent of light with different wavelengths and at strong electric fields, a negative differential photoconductance has been discovered testifying that the WSL is not suppressed at the field inclination in 8° off axis, and a negative TCABV is expected in commercial p-n junctions. © 2006 American Institute of Physics.
Place, publisher, year, edition, pages
2006. Vol. 89, no 23, 233508- p.
National CategoryNatural Sciences
IdentifiersURN: urn:nbn:se:liu:diva-36442DOI: 10.1063/1.2402207Local ID: 31379OAI: oai:DiVA.org:liu-36442DiVA: diva2:257290