Near‐infrared light‐responsive Cu‐doped Cs2AgBiBr6

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F20%3A00536344" target="_blank" >RIV/61389013:_____/20:00536344 - isvavai.cz</a>

Výsledek na webu

<a href="https://onlinelibrary.wiley.com/doi/10.1002/adfm.202005521" target="_blank" >https://onlinelibrary.wiley.com/doi/10.1002/adfm.202005521</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/adfm.202005521" target="_blank" >10.1002/adfm.202005521</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Near‐infrared light‐responsive Cu‐doped Cs2AgBiBr6

Popis výsledku v původním jazyce

Lead‐free halide double perovskites (A2BIBIIIX6) with attractive optical and electronic features are considered to be a promising candidate to overcome the toxicity and stability issues of lead halide perovskites (APbX3). However, their poor absorption profiles limit device performance. Here the absorption band edge of Cs2AgBiBr6 double perovskite to the near‐infrared range is significantly broadened by developing doped double perovskites, Cs2(Ag:Cu)BiBr6. The partial replacement of Ag ions by Cu ions in the crystal lattice is confirmed by the X‐ray photoelectron spectroscopy (XPS) and solid‐state nuclear magnetic resonance (ssNMR) measurements. Cu doping barely affects the bandgap of Cs2AgBiBr6, instead it introduces subbandgap states with strong absorption to the near‐infrared range. More interestingly, the near‐infrared absorption can generate band carriers upon excitation, as indicated by the photoconductivity measurement. This work sheds new light on the absorption modulation of halide double perovskites for future efficient optoelectronic devices.

Název v anglickém jazyce

Near‐infrared light‐responsive Cu‐doped Cs2AgBiBr6

Popis výsledku anglicky

Lead‐free halide double perovskites (A2BIBIIIX6) with attractive optical and electronic features are considered to be a promising candidate to overcome the toxicity and stability issues of lead halide perovskites (APbX3). However, their poor absorption profiles limit device performance. Here the absorption band edge of Cs2AgBiBr6 double perovskite to the near‐infrared range is significantly broadened by developing doped double perovskites, Cs2(Ag:Cu)BiBr6. The partial replacement of Ag ions by Cu ions in the crystal lattice is confirmed by the X‐ray photoelectron spectroscopy (XPS) and solid‐state nuclear magnetic resonance (ssNMR) measurements. Cu doping barely affects the bandgap of Cs2AgBiBr6, instead it introduces subbandgap states with strong absorption to the near‐infrared range. More interestingly, the near‐infrared absorption can generate band carriers upon excitation, as indicated by the photoconductivity measurement. This work sheds new light on the absorption modulation of halide double perovskites for future efficient optoelectronic devices.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10406 - Analytical chemistry

Projekt

<a href="/cs/project/GA19-05259S" target="_blank" >GA19-05259S: Kombinace pokročilé NMR spektroskopiie pevného stavu ultra-širokých čar s XRPD a výpočetní chemie pro zkoumaní organo-kovových a mřížkových materiálů</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Advanced Functional Materials

ISSN

1616-301X

e-ISSN

—

Svazek periodika

30

Číslo periodika v rámci svazku

51

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

7

Strana od-do

1-7

Kód UT WoS článku

000570170300001

EID výsledku v databázi Scopus

2-s2.0-85091004042