Abstract:
The class of halide perovskite materials has been widely used in optoelectronics. The application of
halide perovskites in solar cells has made a significant breakthrough in the field of emerging
photovoltaic (PV) technologies since the last decade. The power conversion efficiencies (PCEs) of
perovskite based solar cells (PSCs) have shown a remarkable increase from the pioneering value of
3.8% in 2009 to the recent record of 25.5 and 29.5% for the single junction device and the tandem
with silicon (Si) respectively. Beyond the field of PV, the three-dimensional halide perovskites and
their low-dimensional counterparts have been also widely explored for applications in light emission.
The metal halide perovskites are promising luminescent materials as they exhibit a high
photoluminescence (PL) quantum yield reaching 100% as well as narrow and symmetric PL
peaks which can be tunable all over the visible spectral range. In just a few years, the external
quantum efficiencies of the green- and red-emitting devices have been enhanced over 20%. Despite
the promising optoelectronic properties of this class of materials, a number of challenges such as
material instability, short device lifetime, processing difficulties in preparation of perovskite
materials in a large scale and on flexible substrates etc. have still not been completely solved
before the stage of commercialization. Over the years, the community has devoted intensive
attentions to investigating the properties of this class of materials as well as understanding their
device physics and a lot of effective strategies for overcoming the aforementioned challenges have
been demonstrated with very promising results. The Research Topic entitled Advances in Perovskite
Materials for Optoelectronic Applications of Frontiers in Materials has a collection of 6 articles
focused on discussing the recent development of halide perovskite-based materials for applications in
solar cells and light emitting diodes...