  Halide perovskites have recently gained widespread attention for their
exceptional optoelectronic properties which have been illuminated by extensive
spectroscopic investigations. In this article, nanophotonic surface-engineering
using soft-lithography has been used to reproduce nanostructures with enhanced
functionalities. A non-invasive optical technique based on Raman and
photolumines-cence (PL) spectroscopy is employed to investigate the interactive
effect of the thermal and optical behaviour in surface-patterned hybrid
organic-inorganic halide perovskite thin films. The thermophys-ical properties
of the engineered perovskite films are extracted from the softening of the
representa-tive peak positions in the Raman and PL spectra of the samples which
act as temperature markers. The investigation suggests a comparatively higher
rise in the local temperature for the patterned thin films resulting from their
enhanced absorption. Therefore, a cross-talk between the opto-thermal transport
phenomena in imprinted perovskite thin films pertaining to both enhancing
device properties along with maintaining device stability is established.
