Abstract
To achieve a material with pure phase and crystallinity, the use of antisolvents is found to be crucial. Herein, we report the synthesis of phase‐pure CsPbBr2I microcrystals with defined morphologies by using trioctylphosphine (TOP) as an antisolvent and capping agent. The as‐prepared inorganic perovskite has enhanced thermal stability and promising optical properties, displaying a band gap of 2.2 eV. The photoluminescence (PL) studies suggest high sensitivity of the as‐prepared inorganic perovskites against nitrophenols, which makes them a potential candidate for the detection of nitrophenol.
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