Boosted high-temperature electrical characteristics of AlGaN/GaN HEMTs with rationally designed compositionally graded AlGaN back barriers. - Haochen Zhang; Yue Sun; Kunpeng Hu; Lei Yang; Kun Liang; Zhanyong Xing; Hu Wang; Mingshuo Zhang; Huabin Yu; Shi Fang; Yang Kang; Haiding Sun (Sci. China Inf. Sci., 2023)