Performance enhancement of ZnO nanowires/PbS quantum dot depleted bulk heterojunction solar cells with an ultrathin Al<sub>2</sub>O<sub>3</sub> interlayer

Performance enhancement of ZnO nanowires/PbS quantum dot depleted bulk heterojunction solar cells with an ultrathin Al₂O₃ interlayer

Zang Shuaipu¹, Wang Yinglin^{1, 2, †}, Li Meiying¹, Su Wei¹, An Meiqi¹, Zhang Xintong^{1, 2, ‡}, Liu Yichun^{1, 2}

(color online) (a) XPS spectra of Zn 2p_3/2, O 1s, and Al 2p signals of ZnO NWs with and without aluminum sec-butoxide solution treatment; (b) comparison of PL characters of different ZnO NWs on FTO substrates (: 325 nm), and the broad peak range from 500 nm to 650 nm results from the luminescence of surface defects of ZnO; (c) schematic illustration of effect of ultrathin Al₂O₃ interlayer on DBH PbS QDSCs.