%0 Journal Article %A Valdueza Felip, Sirona %A Rigutti, Lorenzo %A Naranjo Vega, Fernando Bernabé %A Ruterana, Pierre %A Mangeney, Juliette %A Julien, François H. %A González Herráez, Miguel %A Monroy, Eva %T Carrier localization in InN/InGaN multiple-quantum wells with high In-content %D 2012 %@ 0003-6951 %U http://hdl.handle.net/10017/24918 %X We study the carrier localization in InN/In0.9Ga0.1N multiple-quantum-wells (MQWs) and bulk InN by means of temperature-dependent photoluminescence and pump-probe measurements at 1.55 lm. The S-shaped thermal evolution of the emission energy of the InN film is attributed to carrier localization at structural defects with an average localization energy of 12 meV. Carrier localization is enhanced in the MQWs due to well/barrier thickness and ternary alloy composition fluctuations, leading to a localization energy above 35 meV and longer carrier relaxation time. As a result, the luminescence efficiency in the MQWs is improved by a factor of five over bulk InN. %K Ciencias tecnológicas %K Electrónica %K Technology %K Electronics %~ Biblioteca Universidad de Alcala