What is MAPbI3?
Although MAPbI3 is considered as a prominent light harvester, it suffers from a disturbing tetragonal–cubic phase transition at approximately 56 °C while the operating temperature of solar cells is considered up to 85 °C. Also, Spiro-OMeTAD as HTL (hole transport layer) improves the solar cell performance [23].
Why is MAPbI3 unstable?
Their results suggest that the degradation of MAPbI3 perovskites may not be a fixable issue. The team led by Dr. Wang Shenghao found that iodide-based perovskites will universally produce a gaseous form of iodine during operation, which in turn causes further degradation of perovskite.
What is the bandgap of MAPbI3?
MAPbI3 has a bandgap – believed to be direct – located between 1.5 and 1.6 eV, reasonably close to the optimum given by Shockley-Queisser theory1 (the maximum single band gap efficiency is ∼33.7% at 1.4 eV compared to MAPbI3 at ∼30% to 32%).
What is CH3NH3PbI3?
Methylammonium lead iodide (CH3NH3PbI3) perovskite solar cell has produced a remarkable breakthrough in the photovoltaic history of solar cell technology because of its outstanding device based performance as a light-harvesting semiconductor.
What is Spiro OMeTAD?
Spiro-OMeTAD (Spiro-MeOTAD) is one of the most studied and suitable hole transport layer materials (HTL) due to its facile implementation and high performance in organic-inorganic electronic devices.
What is halide perovskite?
One subclass of these layered hybrid organic–inorganic metal halides that has gained considerable interest because of their better moisture stability and higher degree of optoelectronic fine-tuning than conventional lead halide perovskites is the one containing several consecutive layers of 3D connected metal halides …
Why is perovskite unstable?
Ambient humidity can cause rapid degradation of perovskite films, especially in MAPbI3. The rate of deterioration will increase when high humidity is combined with UV light, high temperatures, or the application of an electric field.
What is mapbbr3?
Structural and Photophysical Properties of Methylammonium Lead Tribromide (MAPbBr3) Single Crystals.
What is perovskite crystal structure?
A perovskite is any material with a crystal structure following the formula ABX3, which was first discovered as the mineral called perovskite, which consists of calcium titanium oxide (CaTiO3). Where ‘A’ and ‘B’ are two ions, often of very different sizes, and X is an ion (frequently oxide) that bonds to both ions.
What is metal halide perovskites?
Metal halide perovskites (MHPs) are an unconventional family of crystalline materials with continuously expanding compositional and structural spaces.
What is hole transport material?
Hole transport materials (HTMs) are one of the key compounds in perovskite solar cells (PSCs), both for the n-i-p and the p-i-n device structures. HTMs can also be used to replace the liquid electrolyte of conventional dye-sensitized solar cells to make solid-state DSSC (ss-DSSC) devices.