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Self-ordered polymeric Lewis acid–base adduct formation for a dual role of passivated CsPbBr3–Cs4PbBr6 perovskite grain morphology modulation and exciton dielectric confinement, thereby exhibiting high performances and stability in PeLEDs.

Mixed-cation hybrid perovskite nanocrystal (HPNC) with high crystallinity, color purity, and tunable optical band gap offers a practical pathway toward next-generation displays. Herein, we present a two-step modified hot-injection combined with cation compositional engineering and surface treatment to synthesize high-purity Cs

Species of the genus Sugiyamaella (Trichomonascaceae, Saccharomycetales), found in rotting wood in China, were investigated using morphology and the molecular phylogeny of a combined ITS and nrLSU dataset. Nine taxa were collected in China: two were new species (viz. Sugiyamaella chuxiongsp. nov. and S. yunanensissp. nov.) and seven were known species, S. americana, S. ayubii, S. novakii, S. paludigena, S. valenteae, S. valdiviana and S. xiaguanensis. The two new species are illustrated and their morphology and phylogenetic relationships with other Sugiyamaella species are discussed. Our results indicate a potentially great diversity of Sugiyamaella spp. inhabiting rotting wood in China just waiting to be discovered.

Five yeast strains were isolated from rotting wood samples collected in the Xishuangbanna Tropical Rainforest, Yunnan Province, PR China. Phylogenetic analysis of the D1/D2 domains of the large subunit rRNA gene indicated that these strains represent two novel species of the genus Kazachstania. Kazachstania jinghongensis sp. nov. produces one to two spherical ascospores per ascus, and is most closely related to Kazachstania lodderae and Kazachstania spencerorum. Kazachstania jinghongensis sp. nov. differed from the type strains of the two latter species by 13-24 substitutions in the D1/D2 domains and by 39-56 substitutions in the ITS regions. Kazachstania menglunensis f.a., sp. nov. is a member of the Kazachstania jiainica subclade, but the formation of ascospores was not observed on various sporulation media. Kazachstania menglunensis sp. nov. differed from other members of the subclade by 23-26 substitutions in the D1/D2 domains and by more than 67 substitutions in the ITS regions. The holotype of Kazachstania jinghongensis sp. nov. is NYNU 17944 (CBS 15232) and the holotype of Kazachstania menglunensis sp. nov. is NYNU 18913 (CBS 16054).

Yamadazyma is one of the largest genera in the family Debaryomycetaceae (Saccharomycetales, Saccharomycetes) with species mainly found in rotting wood, insects and their resulting frass, but also recovered from flowers, leaves, fruits, tree bark, mushrooms, sea water, minerals, and the atmosphere. In the present study, several strains obtained from rotting wood in Henan and Yunnan Provinces of China were isolated. Based on morphology and a molecular phylogeny of the rDNA internal transcribed spacer region (ITS) and the D1/D2 domain of the large subunit (LSU) rDNA, these strains were identified as three new species: Yamadazyma luoyangensis, Y. ovata and Y. paraaseri; and three previously described species, Y. insectorum, Y. akitaensis, and Y. olivae. The three new species are illustrated and their morphology and phylogenetic relationships with other Yamadazyma species are discussed. Our results indicate a high undiscovered diversity of Yamadazyma spp. inhabiting rotting wood in China.

Yamadazyma is one of the largest genera in the family Debaryomycetaceae (Saccharomycetales, Saccharomycetes) with species mainly found in rotting wood, insects and their resulting frass, but also recovered from flowers, leaves, fruits, tree bark, mushrooms, sea water, minerals, and the atmosphere. In the present study, several strains obtained from rotting wood in Henan and Yunnan Provinces of China were isolated. Based on morphology and a molecular phylogeny of the rDNA internal transcribed spacer region (ITS) and the D1/D2 domain of the large subunit (LSU) rDNA, these strains were identified as three new species: Yamadazymaluoyangensis, Y.ovata and Y.paraaseri; and three previously described species, Y.insectorum, Y.akitaensis, and Y.olivae. The three new species are illustrated and their morphology and phylogenetic relationships with other Yamadazyma species are discussed. Our results indicate a high undiscovered diversity of Yamadazyma spp. inhabiting rotting wood in China.

C6H9I5N2O3, triclinic, P1¯ (no. 2), a = 7.4851(5) Å, b = 9.6056(6) Å, c = 12.4084(7) Å, α = 109.119(3)°, β = 99.341(3)°, γ = 92.334(3)°, V = 827.53(9) Å3, Z = 2, R gt (F) = 0.0234, wR ref (F 2) = 0.0449, T = 150.0 K.

C6H7BrN2O2, triclinic, P 1 ‾ $P‾{1}$ (no. 2), a = 7.3026(4) Å, b = 7.4618(4) Å, c = 7.8746(4) Å, α = 81.542(3)°, β = 89.459(3)°, γ = 61.718(3)°, V = 372.86(4) Å3, Z = 2, R gt (F) = 0.0209, wR ref (F 2) = 0.0473, T = 150(2) K.

Species of the genus Sugiyamaella (Trichomonascaceae, Saccharomycetales), found in rotting wood in China, were investigated using morphology and the molecular phylogeny of a combined ITS and nrLSU dataset. Nine taxa were collected in China: two were new species (viz. Sugiyamaella chuxiongsp. nov. and S. yunanensissp. nov.) and seven were known species, S. americana, S. ayubii, S. novakii, S. paludigena, S. valenteae, S. valdiviana and S. xiaguanensis. The two new species are illustrated and their morphology and phylogenetic relationships with other Sugiyamaella species are discussed. Our results indicate a potentially great diversity of Sugiyamaella spp. inhabiting rotting wood in China just waiting to be discovered.

Spathaspora is an important genus of d-xylose-fermenting yeasts that are poorly studied in China. During recent yeast collections in Yunnan Province in China, 13 isolates of Spathaspora were obtained from rotting wood and all represent undescribed taxa. Based on morphological and phylogenetic analyses (ITS and nuc 28S), five new species are proposed: Spathaspora elongata, Sp. mengyangensis, Sp. jiuxiensis, Sp. parajiuxiensis and Sp. rosae. Our results indicate a high species diversity of Spathaspora waiting to be discovered in rotting wood from tropical and subtropical southwest China. In addition, the two Candida species, C. jeffriesii and C. materiae, which are members of the Spathaspora clade based on phylogeny, are transferred to Spathaspora as new combinations.

Low-dimensional perovskites have been widely studied as a promising candidate for realizing stable light-emitting diodes (LEDs). However, blue-light-emitting devices generally possess low stability associated with gradually red-shifted emission. To overcome this issue, the effect of zinc bromide (ZnBr2) addition on the regulation of the crystal structures of phenethylammonium and bromine-chlorine mixed inorganic perovskites (PEA-CsPbBrxCl3-x) is investigated. With the ZnBr2 addition, low-dimensional perovskite structures undergo morphological changes, such as thickening of their crystal structures and higher degree of crystal arrangement. Stoichiometric selective characterization reveals that perovskite bonding forces changed from Van der Waals with PEA to ionic with ZnBr2. Meanwhile, ZnBr2 can effectively address the ion defect filling and dimensional structure property switching. Consequently, the optimized ZnBr2-assisted PEA-CsPbBrxCl3-x LED is shown to deliver a high luminance of 1245 cd/m2 along with a high external quantum efficiency of 1.30%. Furthermore, this blue LED exhibits excellent spectral stability, for which only 3-nm red-shift on external excitation (0.1 to 5.0 mA) is observed. Our result clearly shows that ZnBr2 addition effectively improves the stability of blue light-emitting perovskites.

Perovskite quantum dots (PeQDs) have been under commercial and functional development in recent years since they offer outstanding optoelectronic properties and solution processability. However, both insulating ligands around PeQDs and instability impair the performance of photoelectronic devices. Therefore, we introduce multi-step ligands exchange by silver (Ag)- trioctylphosphine (TOP) as short alkyl ligands to reinforce the optical properties and stability for PeQDs and successfully elevated light-emitting diodes characters. The PeQDs with Ag-TOP ligands (Ag@QD) perform higher photoluminescence quantum yield (PLQY, ~93%), higher exciton binding energy (57.6 meV) with better solvent, temperature, and ambient stability over 1 month presenting better performances on comparison with conventional di-dodecyl dimethyl ammonium bromide (DDAB) or TOP ligands. Nuclear magnetic resonance (NMR), X-ray photoelectron spectroscopy (XPS), and time-resolved photoluminescence (TR-PL) measurement provides clear insight on bilateral affinity in Ag@QD illustrating excellent defect passivation and appropriate steric hindrance. Furthermore, we demonstrate Ag@QD with lower turn-on voltage (~2.8 V), high electroluminescence (~3820 cd/cm−2), and high efficiency (EQE ~ 9.43%).

Organic-inorganic halide perovskites were emerging as promising light emitters due to the high photoluminescence quantum efficiency (PLQE), narrow color spectrum, and facile bandgap tunability. However, the morphological issues of this class of materials remain as a bottleneck in generating high-performance light-emitting devices (LED). In this work, we describe a facile and cost-effective method to improve the morphology of an all-inorganic-perovskite emissive layer by using a dual-additive blending strategy. A polar polymer, polyethylene oxide (PEO), and an n-type small molecule, TPBi, are blended with CsPbBr3 to provide synchronous effect in passivizing the surface defects and reducing the exciton quenching, as evidenced by the formation of smaller uniform grains and improved radiative recombination lifetime. Consequently, the optimized CsPbBr3/PEO/TPBi LED reaches maximum luminance, current efficiency, and external quantum efficiency of 6807 cd m−2 (at 6 V), 0.86 cd A−1 (at 5.5 V) and 0.25% (at 5.5 V), far surpassing the performance of the control CsPbBr3 device. On this basis, we further demonstrated a proof-of-concept LED device with touch-responsivity by using a flexible composite electrode. The merit of dual-additive strategy has been clearly manifested and will facilitate the future development of cost-effective solution processable perovskite LEDs.