Li Wang, Ran Chen, Zhi-Fei Ren, Cai-Wang Ge, Zhen-Xing Liu, Shu-Juan He, Yong-Qiang Yu, Chun-Yan Wu, Lin-Bao Luo*
Abstract: In this study, we report a localized surface plasmon resonance (LSPR) enhanced optoelectronic device based on ZnSe:Sb nanoribbons (NRs) /Si nano-heterojunction. We experimentally demonstrated that the LSPR peaks of plasmonic Ag nanoparticles (Ag NPs) can be readily tuned by changing its size distribution. Optical analysis reveals that the absorption of ZnSe:Sb NRs was increased after the decoration of the Ag NPs with strong LSPR. Further analysis of optoelectronic device confirmed the device performance can be promoted: for example, the short-circuit photocurrent density of the ZnSe/Si heterojunction solar cell was improved by 57.6% from 11.75 to 18.52 mA/cm2 compared to that without Ag NPs. Meanwhile, the responsivity and detectivity of ZnSe:Sb NRs/Si heterojunction device increased from 117.2 to 184.8 mAW-1, and from 5.86×1011 to 9.20×1011 cmHz1/2W-1, respectively.