Perovskites march on: a themed collection
Perovskite-based materials enable solar cells with improved stability and flexibility, which are now considered as the most promising optoelectronic materials for future applications.
Doping strategies for small molecule organic hole-transport materials: impacts on perovskite solar cell performance and stability
Dopants for small molecule-based organic hole-transport layers impact both perovskite solar cells initial performance and long-term stability.
Metal halide perovskite nanomaterials: synthesis and applications
The different synthesis approaches and growth mechanisms of metal halide perovskites will be discussed along with their novel characteristics and applications.
Efficiency vs. stability: dopant-free hole transporting materials towards stabilized perovskite solar cells
Doping of hole transporting materials typically increases the efficiency of perovskite solar cells but remains questionable for overall device stability.
Synthesis and applications of nanoporous perovskite metal oxides
Perovskite-type metal oxides have been widely investigated and applied in various fields in the past several decades due to their extraordinary variability of compositions and structures with targeted physical and chemical properties (e.g., redox behaviour, oxygen mobility, electronic and ionic conductivity).
A pencil-and-paper method for elucidating halide double perovskite band structures
Explaining most known double perovskite electronic structures and predicting new ones using Linear Combination of Atomic Orbitals analysis.
Metal-free perovskites for non linear optical materials
We identify the existence of nonlinear optical (NLO) activity in a number of novel ABX3-type metal-free perovskites, where A is a highly tuneable organic cation, B is a NH4 cation and X is a halide anion.
A structure–property study of fluoranthene-cored hole-transporting materials enables 19.3% efficiency in dopant-free perovskite solar cells
A systematic structure–property correlation study was conducted to preliminarily elucidate an inherent regularity governing the structure of dopant-free HTMs.
On the absence of a phonon bottleneck in strongly confined CsPbBr3 perovskite nanocrystals
Strongly confined CsPbBr3 perovskite nanocrystals exhibit sub-ps hot exciton relaxation dynamics and the absence of a phonon bottleneck.
Facile synthesis of 1D organic–inorganic perovskite micro-belts with high water stability for sensing and photonic applications
The development of low-dimensional perovskite micro/nanostructures with high water stability for novel photonic/electronic applications is highly desirable.
Aqueous acid-based synthesis of lead-free tin halide perovskites with near-unity photoluminescence quantum efficiency
Aqueous acid-based synthesis of lead-free tin halide perovskites with near-unity photoluminescence quantum efficiency and high chemical yield is described.
Picosecond multi-hole transfer and microsecond charge-separated states at the perovskite nanocrystal/tetracene interface
Picosecond hole transfer and microsecond charge-separated states were observed at the perovskite nanocrystal/tetracene interface, which are leveraged to demonstrate the dissociation of up to 5.6 excitons per nanocrystal by multi-hole transfer.
Low cost and stable quinoxaline-based hole-transporting materials with a D–A–D molecular configuration for efficient perovskite solar cells
Molecular hole-transporting materials containing a weak electron acceptor core can simultaneously improve the stability and photovoltaic performance of perovskite solar cells.
A first-principles prediction on the “healing effect” of graphene preventing carrier trapping near the surface of metal halide perovskites
We introduce a healing effect of graphene preventing carrier trapping by the defects near the surface of metal halide perovskites.
Fluoranthene-based dopant-free hole transporting materials for efficient perovskite solar cells
Unreported 2,3-dicyano-fluoranthene was first prepared as an efficient electron-withdrawing building block for constructing D–A type dopant-free hole transporting materials.
3D hole-transporting materials based on coplanar quinolizino acridine for highly efficient perovskite solar cells
A new concept of HTMs for PSCs: a 3D structure with a core of coplanar quinolizino is firstly put forward and demonstrated to be highly effective, and it is derived from the conventional concept of 2D triphenylamine HTM.
Amino-functionalized conjugated polymer electron transport layers enhance the UV-photostability of planar heterojunction perovskite solar cells
Long-term photostability and high performance were achieved by perovskite solar cells with an amino-functionalized conjugated polymer as a new electron transport layer.
Colloidal thallium halide nanocrystals with reasonable luminescence, carrier mobility and diffusion length
Colloidal TlI and TlBr nanocrystals are prepared, which show violet-blue luminescence, high carrier mobility and long diffusion lengths thus suggesting the suppression of deep-trap states.
Energy and charge transfer cascade in methylammonium lead bromide perovskite nanoparticle aggregates
Evidence for an ultrafast light-induced cascade of energy and charge transfer between aggregated quantum-confined nanoplatelets and nanoparticles of CH3NH3PbBr3 perovskite.
Indolo[3,2-b]indole-based crystalline hole-transporting material for highly efficient perovskite solar cells
A fluorinated indolo[3,2-b]indole (IDID) derivative is prepared as a crystalline hole transporting material for perovskite solar cells. A fluorinated IDID backbone enables a tight molecular stacking by π–π interaction. The device fabricated using IDIDF exhibits a PCE of 19%.
About this collection
Perovskite-based materials enable solar cells with improved stability and flexibility, which are now considered as the most promising optoelectronic materials for future applications. This themed collection, curated by Associate Editor Jihong Yu, showcases some of our recent work in this area, and is accompanied by a video abstract.