SOLAR ENERGY
·
2021
·
IF 5.742
Honggang Xie,Jiannan Xu,Can Gao,Jiejing Zhang,Chunxiao Gao,Xizhe Liu
CsPbI 3 triggers strong interest in the photovoltaic community for their promising photoelectric property and nonvolatility. However, CsPbI 3 layers with a-phase crystal structure are difficult for preparation, and these layers easily degrade to non-photoactive δ-phase at room temperature. Tuning the composition of precursor solutions is an important method for improving the properties of CsPbI 3 layers. Herein, we prepare inorganic a-CsPbI 3 perovskite solar cells using lead acetate as the lead source, which is different from conventional precursors with lead iodide as the lead source. The lead acetate precursor needs neither incorporating hydrogen iodide nor preparing PbI 2 complex, and it is shown to enlarge the grain size, improve the crystallinity and reduce the trap density of CsPbI 3 layers. By cooperating the lead acetate precursor with EDAI 2 additive, the power conversion efficiency (PCE) of devices increases from 9.2% to 12.9% and the photo-stability of these devices is improved simultaneously.
研究领域:
材料科学
·
光伏技术
✓ 已验证
DOI
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2023
·
IF 6.8
Rui Yan,Jie Ding,Qianlei Yang,Xiaoyun Zhang,Junyu Han,Tingxu Jin,Shudi Shi,Xirui Wang,Yu Zheng,Heran Li,Hengdong Zhang,Yan An
Skeletal system toxicity due to lead exposure has attracted extensive attention in recent years, but few studies focus on the skeletal toxicity of lead in the early life stages of zebrafish. The endocrine system, especially the GH/IGF-1 axis, plays an important role in bone development and bone health of zebrafish in the early life. In the present study, we investigated whether lead acetate (PbAc) affected the GH/IGF-1 axis, thereby causing skeletal toxicity in zebrafish embryos. Zebrafish embryos were exposed to lead PbAc between 2 and 120 h post fertilization (hpf). At 120 hpf, we measured developmental indices, such as survival, deformity, heart rate, and body length, and assessed skeletal development by Alcian Blue and Alizarin Red staining and the expression levels of bone-related genes. The levels of GH and IGF-1 and the expression levels of GH/IGF-1 axis-related genes were also detected. Our data showed that the LC50 of PbAc for 120 h was 41 mg/L. Compared with the control group (0 mg/L PbAc), after PbAc exposure, the deformity rate increased, the heart rate decreased, and the body length was shortened at various time periods, in the 20-mg/L group at 120 hpf, the deformity rate increased by 50 fold, the heart rate decreased by 34%, and the body length shortened by 17%. PbAc altered cartilage structures and exacerbated bone loss in zebrafish embryos; in addition, PbAc exposure down-regulated the expression of chondrocyte ( sox9a , sox9b ), osteoblast ( bmp2 , runx2 ) and bone mineralization-related genes ( sparc , bglap ), and up-regulated the expression of osteoclast marker genes ( rankl , mcsf ). The GH level increased and the IGF-1 level declined significantly. The GH/IGF-1 axis related genes ( ghra , ghrb , igf1ra , igf1rb , igf2r , igfbp2a , igfbp3 , igfbp5b ) were all decreased. These results suggested that PbAc inhibited the differentiation and maturation of osteoblasts and cartilage matrix, promoted the formation of osteoclasts, and ultimately induced cartilage defects and bone loss by disrupting the GH/IGF-1 axis.
研究领域:
毒理学
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内分泌学
·
发育生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Physica Status Solidi-Rapid Research Letters
·
2019
·Vol. 13
·期 10
·1900176
·
IF 3.729
Qi Zhang,Huizhi Sun,Heyi Zhang,Mao Jiang,Xiaodong Wu,Zhiyuan Zhang,Tongyin Yang,Ruidong Xia,Juan Cabanillas-Gonzalez
Organic–inorganic lead halide perovskites have emerged rapidly as the most attractive materials for photovoltaics in the last 10 years. Intense research has been done on crystal growth and morphology control to improve their power conversion efficiencies. Furthermore, perovskites also show great potential for optical amplification and lasing. Despite the numerous reports on how processing conditions affect the perovskite light-harvesting properties, effects on amplified spontaneous emission (ASE) or lasing performance have attracted considerably less attention. Herein, a detailed study on the ASE performance of methylammonium lead triiodide (MAPbI 3 ) films, processed with lead acetate (Pb(Ac) 2 ) as lead source following a one-step spin-coating method and exposed to different post-deposition conditions, is presented. It is found that the use of Pb(Ac) 2 instead of lead iodide (PbI 2 ) accelerates the crystal growth and simplifies the fabrication procedure. Even very thin MAPbI 3 films (≈70 nm) can sufficiently support optical amplification and lasing in surface-emitting distributed-feedback (DFB) cavities. The facile and highly controllable MAPbI 3 film formation observed with Pb(Ac) 2 as precursor makes it a preferred choice with respect to PbI 2 for future perovskite laser diodes.
研究领域:
材料科学
·
光学工程
·
光电子学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）