Significant enhancement of output performance of piezoelectric nanogenerators based on CsPbBr₃ quantum dots-NOA63 nanocomposites

CsPbBr₃ quantum dots (QDs)-NOA63 nanocomposites (NCs) are fabricated by using a UV-initiated thiol−ene “click” reaction, and the hydrophobic CsPbBr₃ QDs are successfully embedded in the NOA63 matrix without chemical decomposition. The CsPbBr₃ QDs-NOA63 NCs are utilized as a piezoelectric layer for piezoelectric nanogenerators (PENGs), which are compared with PENGs based on NOA63 and on CsPbBr₃ QDs. The average output voltages of the PENGs based on the CsPbBr₃ QDs-NOA63 NCs is significantly larger than that of the PENGs with CsPbBr₃ QDs alone by a factor of 5.55. The significantly higher output voltages of the PENGs based on the CsPbBr₃ QDs-NOA63 NCs is attributed to the very large piezoelectric coupling efficiency due to the utilization of NOA63. Moreover, such PENGs are found to have advantages such as an effective stress transfer, a morphology passivation effect and an enhanced piezoelectric response, and chemical compatibility with CsPbBr₃ QDs.