Ultrafast optical nonlinearity of blue-emitting perovskite nanocrystals

Li, Junzi; Ren, Can; Qiu, Xin; Lin, Xiaodong; Chen, Rui; Yin, Cheng; He, Tingchao

doi:10.1364/prj.6.000554

Cited by 50 publications

(42 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…More recently, NLO properties of double cation mixed perovskite films39 and halide mixed nanocrystals40 have been studied. The nonlinear responses of these materials can enable a great amount of photonic applications.…”

Section: Introductionsupporting

confidence: 85%

Giant Nonlinear Optical Response in Triple Cation Halide Mixed Perovskite Films

Hamad

Kong

Venkatesh

et al. 2020

Advanced Optical Materials

View full text Add to dashboard Cite

exceptional properties including high photostability, extremely long charge diffusion length, and thermal stability. The perovskites have become emerging high-performance materials for various optoelectronic applications such as solar cells, [1][2][3] light emitting diodes, [4,5] photodetectors, [6,7] and lasers. [8,9] The halide perovskites also exhibit strong nonlinear optical (NLO) responses, thus opening up possibilities for optoelectronic device applications. [10][11][12][13][14] For instance, organic-inorganic hybrid perovskites with large two-and three-photon absorption (2PA, 3PA) properties [14][15][16] can be utilized in applications such as bioimaging, [17,18] optical limiting, [19] optical sensor protection, [20] and optical data storage. [21] Nonlinear absorption properties of single crystal, nanocrystal, and filmed perovskites have been intensively studied. [10][11][12][13][14][15][16][22][23][24] Recently, lead halide perovskites such as MAPbI 3 (MA = CH 3 NH 3 ) and MAPbBr 3 have shown higher multiphoton absorption (MPA) probability as the excitation wavelength increases in the IR region. [10][11][12][13][14][22][23][24] Johnson et al. [25] reported that the observation of third-order nonlinearities and decay kinetics in MAPbBr 3 and MAPbBr 2 I with different halogen composition. They showed that the third-order nonlinearities of these materials are larger than those of conventional semiconductors. The photoluminescence of MAPbBr 3 single crystal has also been observed in the green region (522-550 nm) with 1044 nm femtosecond laser excitation due to 2PA. [26] Similar nonlinear optical properties were reported in inorganic perovskites, including CsPbI 3 and CsPbBr 3 . [22,27,28] Another type of perovskite, formamidinium lead iodide (FAPbI 3 ), has a low bandgap (1.47 eV) and greater photostability and thermal stability [29,30] than MAPbI 3 . However, FAPbI 3 has a weak structural stability due to humidity, which prevents it from real-life applications. [31] Recently, it has been demonstrated that the mixture of Cs and MAPbI 3 , CsMAPbI 3 , can lead to a stable solar cell with power conversion efficiency of ≈8%. [32] In addition, the mixture of Cs in FAPbI 3 , such as FA 0.9 Cs 0.1 PbI 3 , showed an improved thermal stability and results in high power conversion efficiency of ≈16.5%. [33] By using this material, Yi et al. have demonstrated power conversion efficiency up to 18% with a halide mixer I/Br. [34] The malleable association The versatility of perovskites through chemical composition modification is critical for enhancing performance of a range of potential applications such as light emitters and integrated photovoltaics. However, a systematic study on the nonlinear optical (NLO) responses of these perovskites is still lacking. Here, for the first time, the NLO properties of triple cation mixed halide perovskite (TCMHP) films, (Cs 0.06 FA 0.79 MA 0.15 )Pb (I 0.85 Br 0.15 ) 3 , using Z-scan and time-resolved spectroscopy, are investigated. It is found that TCMHP film shows strong saturable abs...

show abstract

Section: Introductionsupporting

confidence: 85%

Giant Nonlinear Optical Response in Triple Cation Halide Mixed Perovskite Films

Hamad

Kong

Venkatesh

et al. 2020

Advanced Optical Materials

View full text Add to dashboard Cite

show abstract

“…where f is the solute mole fraction. Surprisingly, this value is 6 orders of magnitude larger than that of CS 2 and several orders of magnitude larger than those of many NIR‐absorbing materials reported thus far, including MAPbI 3 (∼9.5×10 −5 cm 2 GW −1 at 1000 nm), [14] CsPb(Cl 0.53 Br 0.47 ) 3 (∼−1.4×10 −4 cm 2 GW −1 at 620 nm), [15] MoTe 2 film (∼−1.24 cm 2 GW −1 at 800 nm), [16] WS 2 film (∼−8.1 cm 2 GW −1 at 800 nm) [17] and some organic molecules, such as Zn‐terpyridine polymer (∼1.1×10 −4 cm 2 GW −1 at 765 nm) [18] . The large n 2 of our polymer might be attributed to the unique head‐to‐head linkage (noncovalent interactions between pairs of sulfur and oxygen atoms).…”

Section: Resultsmentioning

confidence: 62%

Large Nonlinear Optical Activity of a Near‐infrared‐absorbing Bithiophene‐based Polymer with a Head‐to‐head Linkage

Ren

Xiao

et al. 2021

Chemistry An Asian Journal

Self Cite

View full text Add to dashboard Cite

Although the production of near‐infrared (NIR)‐absorbing organic polymers with an excellent nonlinear optical (NLO) response is vital for various optoelectronic devices and photodynamic therapy, the molecular design and relevant photophysical investigation still remain challenging. In this work, large NLO activity is observed for an NIR‐absorbing bithiophene‐based polymer with a unique head‐to‐head linkage in the NIR region. The saturable absorption coefficient and modulation depth of the polymer are determined as ∼−3.5×105 cm GW−1 and ∼32.43%, respectively. Notably, the polymer exhibits an intrinsic nonlinear refraction index up to ∼−9.36 cm2 GW−1, which is six orders of magnitude larger than that of CS2. The maximum molar‐mass normalized two‐photon absorption cross‐section (σ2/M) of this polymer can be up to ∼14 GM at 1200 nm. Femtosecond transient absorption measurements reveal significant spectral overlap between the 2PA and excited state absorption in the 1000–1400 nm wavelength range and an efficient triplet quantum yield of ∼36.7%. The results of this study imply that this NIR‐absorbing polymer is promising for relevant applications.

show abstract

“…The diversity of perovskite composition makes them band gap tunable, synthesis facile, solution processable, as well as cost less. Of particularly, perovskite nanocrystals (NCs), as an interesting and important class of nanomaterials, exhibit unique properties including high exciton binding energy, optical nonlinearities and high fluorescence quantum yield [11–15] . This potentially provides a platform for exploring new photophysical properties of perovskite quantum wells and possesses outstanding photoluminescence in light emitting devices, stimulated lasing, and single‐dot spectroscopy.…”

Section: Figurementioning

confidence: 99%

Ultrastable Perovskite–Zeolite Composite Enabled by Encapsulation and In Situ Passivation

Wang

Liu

et al. 2020

Angewandte Chemie

View full text Add to dashboard Cite

Metal halide perovskites have been widely applied in optoelectronic fields, but their poor stability hinders their actual applications. A perovskite-zeolite composite was synthesized via in situ growth in air from aluminophosphate AlPO-5 zeolite crystals and perovskite nanocrystals. The zeolite matrix provides quantum confinement for perovskite nanocrystals, achieving efficient green emission, and it passivates the defects of perovskite by H-bonding interaction, which leads to a longer lifetime compared to bulk perovskite film. Furthermore, the AlPO-5 zeolite also acts as a protection shield and enables ultrahigh stability of perovskite nanocrystals under 150 8C heat stress, under a 15-month long-term ambient exposure, and even in water for more than 2 weeks, respectively. The strategy of in situ passivation and encapsulation for the perovskite@AlPO-5 composite was amenable to a range of perovskites, from MA-to Cs-based perovskites. Benefiting from high stability and photoluminescence performance, the composite exhibits great potential to be virtually applied in light-emitting diodes (LEDs) and backlight displays.

show abstract

Ultrafast optical nonlinearity of blue-emitting perovskite nanocrystals

Cited by 50 publications

References 39 publications

Giant Nonlinear Optical Response in Triple Cation Halide Mixed Perovskite Films

Giant Nonlinear Optical Response in Triple Cation Halide Mixed Perovskite Films

Large Nonlinear Optical Activity of a Near‐infrared‐absorbing Bithiophene‐based Polymer with a Head‐to‐head Linkage

Ultrastable Perovskite–Zeolite Composite Enabled by Encapsulation and In Situ Passivation

Contact Info

Product

Resources

About