Revealing Electronic Properties in Template-Grown Perovskite CsPbBr₃ Nanorods

We develop a general and vibrant bottlebrush-like block copolymer nanoreactor platform to craft a library of one-dimensional (1D) all-inorganic perovskite CsPbBr₃ nanorods (NRs) [1]. We capitalize on contactless dielectric force microscopy (DFM), a novel contactless scanning probe microscopy (SPM)-based imaging technique, to probe electronic properties in these templated CsPbBr₃ NRs. It is found that all freshly prepared CsPbBr₃ NRs samples exhibit ambipolar behaviors, indicating an improved control of their electronic properties over their nanowire (NW) counterparts synthesized via the conventional hot-injection method [2]. Moreover, template-grown CsPbBr₃ NRs demonstrate better nanoscale electronic homogeneity than conventional ones [2]. As such, templated CsPbBr₃ NRs represent promising building blocks for electronic and optoelectronic applications that require uniform polarity and nanoscale electronic homogeneity.