Nearly Perfect Triplet-Triplet Energy Transfer from Wannier Excitons to Naphthalene in Organic-Inorganic Hybrid Quantum-Well Materials

Abstract

We report the observation of extremely efficient energy transfer (greater than 99%) in an organic-inorganic hybrid quantum-well structure consisting of perovskite-type lead bromide well layers and naphthalene-linked ammonium barrier layers. Time-resolved photoluminescence measurements confirm that the transfer is triplet-triplet Dexter-type energy transfer from Wannier excitons in the inorganic well to the triplet state of naphthalene molecules in the organic barrier. Using measurements in the 10-300 K temperature range, we also investigated the temperature dependence of the energy transfer.

A New Class of Nanostructured Inorganic–Organic Hybrid Semiconductors Based on II–VI Binary Compounds

“…The interactions between inorganic and organic species in perovskite hybrids are primarily ionic, accompanied also with relatively weak hydrogen-bonds or van der Waals forces in some cases. The layered perovskite hybrid structures provide a good platform for the preparation and investigation of two-dimensional (2D) quantum well systems (89)(90)(91)(92). A number of interesting optical, electrical, and magnetic properties have been discovered in these materials (75,90,(93)(94)(95)(96)(97)(98)(99)(100)(101)(102)(103)(104)(105)(106)(107)(108).…”

Pressure dependence of phosphorescence through energy transfer from inorganic quantum well to naphthalene chromophore in (C10H7C2H4NH3)2PbCl4

“…Then, the singlet exciton is converted to a triplet exciton by intersystem crossing [7]. The energy of the triplet exciton in lead halide quantum well transfers to the triplet state of naphthalene chromophore efficiently [6] for phosphorescence.…”

“…The energy transfer of lead halide-based organic-inorganic hybrid quantum well compounds with naphthalene chromophore was discussed at ambient pressure [3,6]. In the model in Ref.…”

“…Lead halide-based organic-inorganic hybrid compounds having the general formula, (RNH 3 ) 2 PbX 4 , are composed of a two dimensional semiconducting sublattice of corner-sharing [PbX 6 4-] octahedra separated by insulating organic layers of RNH 3 + (X: Cl, Br and I, R: alkylchain or π-conjugated chromophore). The inorganic sublattice plays a role as multi-quantum wells for carriers and excitons, since the lead halide layers have a narrower band gap than the HOMO-LUMO gap of the organic layers.…”

Lead chloride-based layered perovskite incorporated with an excited state intramolecular proton transfer dye

“…With these advantages, OILP has now become a hot target for investigating strong light-matter coupling [5][6][7][8]. On the other hand, there have been several reports in which the optically inert organic part, usually working only as a separator between inorganic perovskite sheets, is replaced with a fluorescent organic dye [9][10][11][12][13]. These attempts are expected to provide an attractive system where two types of excitons (Wannier and Frenkel, formed within inorganic and organic sheets, respectively) coexist and correlate with each other [14][15][16].…”