Fig. 5: Chiroptical properties of hierarchically chiral polycrystals and circularly polarized characteristics of the LED device. | Nature Communications

Fig. 5: Chiroptical properties of hierarchically chiral polycrystals and circularly polarized characteristics of the LED device.

From: Biomimetic non-classical crystallization drives hierarchical structuring of efficient circularly polarized phosphors

Fig. 5

a PL spectra of Cu4I4(L1)44+ Cu8I124−, Cu5I7(L2)2, Cu5I7(L3)2, and Cu5I7(L4)2 polycrystals synthesized with different concentration of ligands: 6 mM (L1), 20 mM (L2), 40 mM (L3), 20 mM (L4). PLQY, the photoluminescence quantum yields. The PLQY of hierarchically structured polycrystals is 32%, 50%, 7%, 6% for Cu4I4(L1)44+ Cu8I124−, Cu5I7(L2)2, Cu5I7(L3)2 and Cu5I7(L4)2, respectively. b–d The corresponding CD spectra (b), CPL spectra (c), and glum spectra (d). e Chromaticity coordinates graph of the LED device with the coating of Cu4I4(L1)44+ Cu8I124− polycrystals. Inset: image of the fabricated LED device under operation. f, g CPL spectra (f) and the polarized degree analysis (g) of the fabricated LED device based on Cu4I4(L1)44+ Cu8I124− polycrystals powered by 2.4 V. Source data are provided as a Source Data file.

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