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Objective To explore the status and factors influencing the intrinsic capacity of hospitalized elderly patients, in order to provide a reference for further activity to maintain the function of the elderly and improve the outcome. Methods Using a convenience sampling method, 264 elderly patients admitted to the geriatric ward from March 2020 to April 2022 were selected as the study population, and the WHO-recommended intrinsic capacity assessment tool, the Geriatric Index of Comorbidity (GIC) and the General Information Questionnaire were applied to analyze the status and factors influencing the intrinsic capacity of hospitalized elderly patients. Results The intrinsic capacity score of 264 elderly patients was 2. 0 (2. 0, 3. 0), and 94. 32%(249/263) of elderly inpatients had a decrease in at least one dimension of intrinsic capacity. There were differences in age, marital status, residence status, and number of GIC diseases and GIC-disease burden among elderly inpatients with different status of intrinsic capacity in univariate analysis (P < 0. 05). Logistic regression analysis suggested that age (OR=0. 904, 95% CI: 0. 869 to 0. 941) and residence status (OR=0. 254, 95% CI: 0. 092 to 0. 700) were independent influences on the intrinsic capacity of hospitalized elderly patients. Conclusion Intrinsic capacity impairment in hospitalized elderly patients is common. Age and residential status are influential factors in the intrinsic capacity of hospitalized elderly patients. Although multi-morbidity in older adults is correlated to intrinsic capacity to some extent, but it is not an independent influence of intrinsic capacity. (目的 探讨住院老年患者内在能力现状及影响因素, 为进一步采取积极措施维持老年人功能和改善预后提供参考依据。方法 采用便利抽样的方法, 选取2020年3月—2022年4月入住医院老年医学病房的264例老年患者作为研究对象, 应用WHO推荐的内在能力评估工具、老年人共病指数(GIC)及一般资料问卷进行调查, 分析住院老年患者的内在能力现状及影响因素。结果 264例老年患者的内在能力得分为2. 0(2. 0, 3. 0), 有94. 32%(249/263)的老年住院患者存在至少1个维度的内在能力下降。单因素分析中内在能力不同状态的老年住院患者之间年龄、婚姻状况、居住情况及GIC疾病数目与GIC疾病负担存在差异(P＜0. 05)。Logistics回归分析提示年龄(OR=0. 904, 95%CI: 0. 869～0. 941)及居住情况(OR=0. 254, 95%CI: 0. 092～0. 700)是住院老年患者内在能力的独立影响因素。结论 住院老年患者内在能力下降的情况普遍存在。年龄和居住情况是住院老年患者内在能力的影响因素。虽然老年人多病共存在一定程度上与内在能力具有相关性, 但并非内在能力的独立影响因素。)

A double‐fibril network of the photoactive layer morphology is recognized as an ideal structure facilitating exciton diffusion and charge carrier transport for high‐performance organic solar cells (OSCs). However, in the layer‐by‐layer processed OSCs (LbL‐OSCs), polymer donors and small molecule acceptors (SMAs) are separately deposited, and it is challenging to realize a fibril network of pure SMAs with the absence of tight interchain entanglement as polymers. In this work, crystalline small molecule donors (SMDs), named TDZ‐3TR and SeDZ‐3TR, were designed and introduced into the L8‐BO acceptor solution, forcing the phase separation and molecular fibrilization. SeDZ‐3TR showed higher crystallinity and lower miscibility with L8‐BO acceptor than TDZ‐3TR, enabling more driving force to favor the phase separation and better molecular fibrilization of L8‐BO. On the other hand, two donor polymers of PM6 and D18 with different fibril widths and lengths were put together to optimize the fibril network of the donor layer. The simultaneously optimization of the acceptor and donor layers resulted in a more ideal double‐fibril network of the photoactive layer and an impressive power conversion efficiency (PCE) of 19.38 % in LbL‐OSCs. [ABSTRACT FROM AUTHOR]

As simple and versatile tools, additives have been widely used to refine active layer morphology and have played a crucial role in boosting the power conversion efficiency (PCE) of organic solar cells (OSCs). Herein, three novel solvent additives named Th‐FSi, Th‐ClSi, and Th‐BrSi with the same backbone of 2,5‐bis(trimethylsilyl)thiophene are designed and synthesized by substituting different halogens of fluorine, chlorine, and bromine, respectively. Notably, Th‐ClSi exhibits the more significant dipole moment and engages in non‐covalent interactions with a small‐molecule acceptor (SMA) L8‐BO, which slight adjustments in intermolecular interaction, crystallinity, and molecular packing in the PM6:L8‐BO active layer. Consequently, the OSCs incorporating Th‐ClSi outperform their Th‐FSi and Th‐BrSi counterparts in photo‐capturing, reduced energy loss, superior exciton dissociation, and charge transfer properties, out‐coming yields in an enhanced PCE of 18.29%. Moreover, by integrating a near‐infrared absorbing SMA (BTP‐eC9) guest into the PM6:L8‐BO matrix, the absorption spectrum to span 880–930 nm, and the resultant ternary OSCs achieve a commendable PCE of 19.17%, ranking among the highest efficiencies reported to date is expanded. These findings underscore the promise of halogenated thiophene‐based solvent additives as a potent avenue for morphological fine‐tuning and consequent PCE enhancement in OSCs. [ABSTRACT FROM AUTHOR]

Background: Antral follicles consist of an oocyte cumulus complex surrounding by somatic cells, including mural granulosa cells as the inner layer and theca cells as the outsider layer. The communications between oocytes and granulosa cells have been extensively explored in in vitro studies, however, the role of oocyte-derived factor GDF9 on in vivo antral follicle development remains elusive due to lack of an appropriate animal model. Clinically, the phenotype of GDF9 variants needs to be determined. Methods: Whole-exome sequencing (WES) was performed on two unrelated infertile women characterized by an early rise of estradiol level and defect in follicle enlargement. Besides, WES data on 1,039 women undergoing ART treatment were collected. A Gdf9Q308X/S415T mouse model was generated based on the variant found in one of the patients. Results: Two probands with bi-allelic GDF9 variants (GDF9His209GlnfsTer6/S428T, GDF9Q321X/S428T) and eight GDF9S428T heterozygotes with normal ovarian response were identified. In vitro experiments confirmed that these variants caused reduction of GDF9 secretion, and/or alleviation in BMP15 binding. Gdf9Q308X/S415T mouse model was constructed, which recapitulated the phenotypes in probands with abnormal estrogen secretion and defected follicle enlargement. Further experiments in mouse model showed an earlier expression of STAR in small antral follicles and decreased proliferative capacity in large antral follicles. In addition, RNA sequencing of granulosa cells revealed the transcriptomic profiles related to defective follicle enlargement in the Gdf9Q308X/S415T group. One of the downregulated genes, P4HA2 (a collagen related gene), was found to be stimulated by GDF9 protein, which partly explained the phenotype of defective follicle enlargement. Conclusions: GDF9 bi-allelic variants contributed to the defect in antral follicle development. Oocyte itself participated in the regulation of follicle development through GDF9 paracrine effect, highlighting the essential role of oocyte-derived factors on ovarian response. [ABSTRACT FROM AUTHOR]

To simultaneously stabilize cesium lead triiodide (CsPbI3) precursor solution and passivate the defects in CsPbI3 film is greatly significant for achieving highly stable and efficient CsPbI3 perovskite solar cells (PSCs). Herein, an effective redox 4‐fluorobenzothiohydrazide (FBTH) is developed to stabilize the precursor solution and passivate iodine/lead‐related defects for high‐quality CsPbI3 film. The comprehensive research confirms that 1) a new compound FBTH‐I is obtained from an effective redox interaction between FBTH and molecular iodine (I2) in perovskite precursor solution, which can effectively impede the formation of I2 molecule and restrain I− migration in perovskite film by forming N–H···I bond; 2) FBTH‐I can also passivate Pb‐related defects via forming S···Pb interaction. Consequently, the CsPbI3 PSC based on FBTH‐treated precursor solution exhibits a fascinating power conversion efficiency (PCE) of 21.41%, which is one of the highest PCE values among the reported pure CsPbI3 PSCs so far, and an outstanding stability against the harsh conditions, such as thermal annealing and continuous light‐illumination. [ABSTRACT FROM AUTHOR]

Employing volatile solid additives have emerged as a promising method to optimize the morphology and improve the performance of organic solar cells (OSCs). However, principles governing the efficient design of solid additives remain elusive. Herein, the programmed fluorination and/or bromination on benzene core to develop efficient additives for OSCs is reported. The programmed fluorination and/or bromination endow the five halogen benzene derivatives, 1,3,5‐trifluorobenzene, hexafluorobenzene, 1,3,5‐tribromo‐2,4,6‐trifluorobenzene (TFTB), 1,3,5‐tribromobenzene, and hexabromobenzene, with different melting and boiling points, volatility, as well as interactions with the host blend. Studies indicate that the additives with extremely high and low volatility are almost powerless and even detrimental to the morphology evolution. Among them, the combination of fluorine and bromine atoms on TFTB not only enables the more appropriate m.p./b.p. and volatility, but also exerts stronger molecular interactions with the host blend, giving rise to higher ordered molecular packing and more favorable morphology. Importantly, TFTB exhibits good universality to optimize the performances of OSCs with high power conversion efficiencies (PCEs; over 18%) in a group of binary blend systems, and an impressive PCE of 19.43% in the ternary PBTz‐F:PM6:L8‐BO system. [ABSTRACT FROM AUTHOR]

Although the power conversion efficiency (PCE) of perovskite solar cells (PSCs) is 26.1%, their stability is still a roadblock for large‐scale commercialization. In the initial density‐functional theory research, it is shown that the most damaging type of defect that destroys device performance is undercoordinated Pb2+ on the surface of the perovskite thin film. An ultraviolet‐absorbent material, 2‐hydroxybenzophenone (HBP), is utilized to specifically passivate this type of defect. In theoretical studies, it is shown that it effectively binds to the undercoordinated Pb2+ via its –C═O group. It also passivates I−‐related defects by forming a hydrogen bond using its –OH group, resulting in decreased trap density and hence prolonged carrier lifetime. The HBP can absorb ultraviolet irradiation, leading to much‐reduced UV degradation; its hydrophobic benzene rings protect the perovskite from moisture permeation. As a result, the constructed device reaches a high PCE of 16.39% with superior stability. The bare device maintains 80.4% of its initial PCE after exposure to ambient air for 792 h. In comparison, the control device without HBP retains only 63.2% of its initial efficiency. Under UV irradiation (80 mW cm−2, 365 nm) for 13 h, the former retains 77.9% of its initial PCE while the control device lost 52% of its initial value. [ABSTRACT FROM AUTHOR]

All‐inorganic perovskite solar cells (PSCs) have been the research focus due to their high thermal stability and proper band gap for tandem solar cells. However, their power conversion efficiency (PCE) is still lower than that of organic‐inorganic hybrid PSCs. Herein, a sacrificing dye (Rhodamine B isothiocyanate, RBITC) is developed to regulate the growth of perovskite film by in situ release of ethylammonium cations, isothiocyanate anions and benzoic acid molecules upon annealing and illumination. The ethylammonium cations can efficiently passivate surface defects. The isothiocyanate anions incorporate with uncoordinated Pb to regulate the crystallization process. The benzoic acid molecules facilitate the nucleation of the perovskite crystals. Especially, the illumination can accelerate the release of these beneficial ions/molecules to improve the quality of perovskite films further. After optimization with RBITC, a high open circuit voltage (VOC) of 1.24 V and a champion PCE of 20.95% are obtained, which are among the highest Voc and PCE values of CsPbI3 PSCs. Accordingly, the operational stability of the PSC devices is significantly improved. The results provide an efficient chemical strategy to regulate the formation of perovskite films in whole crystallization process for high performance all‐inorganic PSCs. [ABSTRACT FROM AUTHOR]

The poor interface quality between cesium lead triiodide (CsPbI3) perovskite and the electron transport layer limits the stability and efficiency of CsPbI3 perovskite solar cells (PSCs). Herein, a 4‐amino‐2,3,5,6‐tetrafluorobenzoate cesium (ATFC) is designed as a bifacial defect passivator to tailor the perovskite/TiO2 interface. The comprehensive experiments demonstrate that ATFC can not only optimize the conductivity, electron mobility, and energy band structure of the TiO2 layer by passivation of the undercoordinated Ti4+, oxygen vacancy (VO), and free OH defects but also promote the yield of high‐quality CsPbI3 film by synergistic passivation of undercoordinated Pb2+ defects with the CO group and F atom, and limiting I− migration via F···I interaction. Benefiting from the above interactions, the ATFC‐modified CsPbI3 device yields a champion power conversion efficiency (PCE) of 21.11% and an excellent open‐circuit voltage (VOC) of 1.24 V. Meanwhile, the optimized CsPbI3 PSC maintains 92.74% of its initial efficiency after aging 800 h in air atmosphere, and has almost no efficiency attenuation after tracking at maximum power point for 350 h. [ABSTRACT FROM AUTHOR]

All‐inorganic CsPbX3 (X = I, Br, Cl or their mixtures) perovskites attract enormous attention in recent years due to their excellent optoelectronic properties, outstanding thermal/light stability, and wide range of applications in electronic devices. Encouragingly, the reported power conversion efficiency of CsPbX3 perovskite solar cells (PSCs) rockets up from 2.9% in 2015 to the present 21.0%. In order to further promote the performance of CsPbX3 PSCs toward the Shockley–Queisser efficiency limit, it is important to optimize the quality of perovskite films by crystallization kinetics modulation and defect suppression. In this review, first, some fundamental information about all‐inorganic CsPbX3 perovskites is briefly introduced, including the crystallization mechanism, growth mode, crystal structure, and phase stability as well as possible defects and their effects on device performance. Second, the recent exciting progress of the crystallization modulation strategies for high‐quality CsPbX3 films is summarized and discussed in detail. The advantages of different strategies, including annealing engineering, solvent engineering, precursor engineering, composition engineering, and interface engineering, are highlighted. Finally, methods for improving the efficiency of inorganic PSCs are discussed, and the future development prospects of inorganic PSCs are also outlined. [ABSTRACT FROM AUTHOR]