Organometallic halide perovskites: sharp optical absorption edge and its relation to photovoltaic performance

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F14%3A00432513" target="_blank" >RIV/68378271:_____/14:00432513 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1021/jz500279b" target="_blank" >http://dx.doi.org/10.1021/jz500279b</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/jz500279b" target="_blank" >10.1021/jz500279b</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Organometallic halide perovskites: sharp optical absorption edge and its relation to photovoltaic performance

Popis výsledku v původním jazyce

Solar cells based on organometallic halide perovskite absorber layers are emerging as a high-performance photovoltaic technology. Using highly sensitive photothermal de?ection and photocurrent spectroscopy, we measure the absorption spectrum of CH3NH3PbI3 perovskite thin ?lms at room temperature. We ?nd a high absorption coe?cient with particularly sharp onset. Below the bandgap, the absorption is exponential over more than four decades with an Urbach energy as small as 15 meV, which suggests a well-ordered microstructure. No deep states are found down to the detection limit of 1cm1. These results con?rm the excellent electronic properties of perovskite thin ?lms, enabling the very high open-circuit voltages reported for perovskite solar cells. Following intentional moisture ingress, we ?nd that the absorption at photon energies below 2.4 eV is strongly reduced, pointing to a compositional change of the material.

Název v anglickém jazyce

Organometallic halide perovskites: sharp optical absorption edge and its relation to photovoltaic performance

Popis výsledku anglicky

Solar cells based on organometallic halide perovskite absorber layers are emerging as a high-performance photovoltaic technology. Using highly sensitive photothermal de?ection and photocurrent spectroscopy, we measure the absorption spectrum of CH3NH3PbI3 perovskite thin ?lms at room temperature. We ?nd a high absorption coe?cient with particularly sharp onset. Below the bandgap, the absorption is exponential over more than four decades with an Urbach energy as small as 15 meV, which suggests a well-ordered microstructure. No deep states are found down to the detection limit of 1cm1. These results con?rm the excellent electronic properties of perovskite thin ?lms, enabling the very high open-circuit voltages reported for perovskite solar cells. Following intentional moisture ingress, we ?nd that the absorption at photon energies below 2.4 eV is strongly reduced, pointing to a compositional change of the material.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název periodika

Journal of Physical Chemistry Letters

ISSN

1948-7185

e-ISSN

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Svazek periodika

5

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

5

Strana od-do

1035-1039

Kód UT WoS článku

000333381400018

EID výsledku v databázi Scopus

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