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Article Dans Une Revue Chemistry of Materials Année : 2007

Reduced band gap hybrid perovskites resulting from combined hydrogen and halogen bonding at the organic-inorganic interface

Résumé

Undistorted perovskite layers are formed in PbI4-based hybrid perovskites incorporating X−(CH2)2−NH3+ (X = Br, Cl) cations. The outstanding structural feature of these compounds is the result of halogen and hydrogen bonding at the organic−inorganic interface, leading to the absence of hydrogen bonds between equatorial iodine atoms of the perovskite layer and ammonium parts, these last being located out of perovskite layers. As a consequence, these red salts display a reduced band gap (2.2 eV) which is assigned to a more disperse HOMO band compared to other salts such as (I−(CH2)2−NH3)2PbI4.
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Dates et versions

hal-00391941 , version 1 (30-10-2023)

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Sébastien Sourisseau, Nicolas Louvain, Wenhua Bi, Nicolas Mercier, David Rondeau, et al.. Reduced band gap hybrid perovskites resulting from combined hydrogen and halogen bonding at the organic-inorganic interface. Chemistry of Materials, 2007, 19 (3), pp.600-607. ⟨10.1021/cm062380e⟩. ⟨hal-00391941⟩
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