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SUMMARY:THE EFFECT OF TEMPERATURE AND DIMENSIONALITY ON EXCITONIC DISSOCIAT
 ION IN LAYERED HYBRID HALIDE PEROVSKITES
LOCATION:Chemistry A101
TZID:America/Denver
DTSTART:20180101T000000
UID:2026-04-27-22-18-45@natsci.colostate.edu
DTSTAMP:20260427T221845
Description:Literature Seminar Abstract:\n\nCharge dynamics in materials su
 ch as recombination lifetimes and mobility are fundamental in understandin
 g the way devices work. A family of hybrid halide perovskites with the for
 mula A’2An-1BnX3n+1 (where A’ = RNH3+\, A = CH3NH3+\, B = divalent met
 al center\, X = halide\, and n is an integer) are of interest for their wh
 ite-light emission with applications in solid-state lighting. This emissio
 n is thought to arise from excitons – a coulombically bound electron hol
 e pair – separating into free charges. Charge dynamics\, specifically ex
 citonic dissociation\, is not well understood in these materials. A recent
  report by Gélvez-Rueda and coworkers studies the effect of temperature a
 nd dimensionality on excitonic dissociation in a system of layered lead-io
 dide perovskites using a combination of microwave conductivity measurement
 s. They determine exciton dissociation and formation of free charges are i
 nversely proportional by measuring the mobility of free charges through th
 e layered perovskites. This work shows direct experimental evidence for th
 e formation of free carriers upon excitonic dissociation. 4:00 pm
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