Size-And Wavelength-Dependent Two-Photon Absorption Cross-Section of CsPbBr3 Perovskite Quantum Dots

Research output: Contribution to journalArticle

Standard

Size-And Wavelength-Dependent Two-Photon Absorption Cross-Section of CsPbBr3 Perovskite Quantum Dots. / Chen, Junsheng; Zidek, Karel; Chábera, Pavel; Liu, Dongzhou; Cheng, Pengfei; Nuuttila, Lauri; Al-Marri, Mohammed J.; Lehtivuori, Heli; Messing, Maria E.; Han, Keli; Zheng, Kaibo; Pullerits, Tõnu.

In: Journal of Physical Chemistry Letters, Vol. 8, No. 10, 18.05.2017, p. 2316-2321.

Research output: Contribution to journalArticle

Harvard

APA

CBE

MLA

Vancouver

Author

Chen, Junsheng ; Zidek, Karel ; Chábera, Pavel ; Liu, Dongzhou ; Cheng, Pengfei ; Nuuttila, Lauri ; Al-Marri, Mohammed J. ; Lehtivuori, Heli ; Messing, Maria E. ; Han, Keli ; Zheng, Kaibo ; Pullerits, Tõnu. / Size-And Wavelength-Dependent Two-Photon Absorption Cross-Section of CsPbBr3 Perovskite Quantum Dots. In: Journal of Physical Chemistry Letters. 2017 ; Vol. 8, No. 10. pp. 2316-2321.

RIS

TY - JOUR

T1 - Size-And Wavelength-Dependent Two-Photon Absorption Cross-Section of CsPbBr3 Perovskite Quantum Dots

AU - Chen, Junsheng

AU - Zidek, Karel

AU - Chábera, Pavel

AU - Liu, Dongzhou

AU - Cheng, Pengfei

AU - Nuuttila, Lauri

AU - Al-Marri, Mohammed J.

AU - Lehtivuori, Heli

AU - Messing, Maria E.

AU - Han, Keli

AU - Zheng, Kaibo

AU - Pullerits, Tõnu

PY - 2017/5/18

Y1 - 2017/5/18

N2 - All-inorganic colloidal perovskite quantum dots (QDs) based on cesium, lead, and halide have recently emerged as promising light emitting materials. CsPbBr3 QDs have also been demonstrated as stable two-photon-pumped lasing medium. However, the reported two photon absorption (TPA) cross sections for these QDs differ by an order of magnitude. Here we present an in-depth study of the TPA properties of CsPbBr3 QDs with mean size ranging from 4.6 to 11.4 nm. By using femtosecond transient absorption (TA) spectroscopy we found that TPA cross section is proportional to the linear one photon absorption. The TPA cross section follows a power law dependence on QDs size with exponent 3.3 ± 0.2. The empirically obtained power-law dependence suggests that the TPA process through a virtual state populates exciton band states. The revealed power-law dependence and the understanding of TPA process are important for developing high performance nonlinear optical devices based on CsPbBr3 nanocrystals.

AB - All-inorganic colloidal perovskite quantum dots (QDs) based on cesium, lead, and halide have recently emerged as promising light emitting materials. CsPbBr3 QDs have also been demonstrated as stable two-photon-pumped lasing medium. However, the reported two photon absorption (TPA) cross sections for these QDs differ by an order of magnitude. Here we present an in-depth study of the TPA properties of CsPbBr3 QDs with mean size ranging from 4.6 to 11.4 nm. By using femtosecond transient absorption (TA) spectroscopy we found that TPA cross section is proportional to the linear one photon absorption. The TPA cross section follows a power law dependence on QDs size with exponent 3.3 ± 0.2. The empirically obtained power-law dependence suggests that the TPA process through a virtual state populates exciton band states. The revealed power-law dependence and the understanding of TPA process are important for developing high performance nonlinear optical devices based on CsPbBr3 nanocrystals.

UR - http://www.scopus.com/inward/record.url?scp=85019354037&partnerID=8YFLogxK

U2 - 10.1021/acs.jpclett.7b00613

DO - 10.1021/acs.jpclett.7b00613

M3 - Article

C2 - 28480702

AN - SCOPUS:85019354037

VL - 8

SP - 2316

EP - 2321

JO - The Journal of Physical Chemistry Letters

JF - The Journal of Physical Chemistry Letters

SN - 1948-7185

IS - 10

ER -