Tuning the Excited-State Dynamics of CuI Films with Electrochemical Bias

Owing to its high hole conductivity and ease of preparation, CuI was among the first inorganic hole-transporting materials that were introduced early on in metal halide perovskite solar cells, but its full potential as a semiconductor material is still to be realized. We have now performed ultrafast spectroelectrochemical experiments on ITO/CuI electrodes to show the effect of applied bias on the excited-state dynamics in CuI. Under operating conditions, the recombination of excitons is dependent on the applied bias, and it can be accelerated by decreasing the potential from +0.6 to -0.1 V vs Ag/AgCl. Prebiasing experiments show the persistent and reversible "memory" effect of electrochemical bias on charge carrier lifetimes. The excitation of CuI in a CuI/CsPbBr3 film provides synergy between both CuI and CsPbBr3 in dictating the charge separation and recombination.

Medienart:

E-Artikel

Erscheinungsjahr:

2019

Erschienen:

2019

Enthalten in:

Zur Gesamtaufnahme - volume:4

Enthalten in:

ACS energy letters - 4(2019), 3 vom: 08. März, Seite 702-708

Sprache:

Englisch

Beteiligte Personen:

Samu, Gergely F [VerfasserIn]
Scheidt, Rebecca A [VerfasserIn]
Balog, Ádám [VerfasserIn]
Janáky, Csaba [VerfasserIn]
Kamat, Prashant V [VerfasserIn]

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Journal Article

Anmerkungen:

Date Revised 06.10.2023

published: Print-Electronic

Citation Status PubMed-not-MEDLINE

doi:

10.1021/acsenergylett.9b00182

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM295050632