Exceptionally Stable CH3 NH3 PbI3 Films in Moderate Humid Environmental Condition

Exceptionally Stable CH3NH3PbI3 Films in Moderate Humid Environmental Condition

An unprecedentedly stable CH3NH3PbI3 film synthesized by a modified chemical vapor transport method is demonstrated. The results show that the crystal structure, light absorption, and device efficiency do not degrade after storing for 100 d in air with 40% relative humidity, while the conventional solution-processed perovskites are usually stable for less than 20 d in similar conditions.

Exceptionally small balls in stable trees

The γ-stable trees are random measured compact metric spaces that appear as the scaling limit of Galton-Watson trees whose offspring distribution lies in a γ-stable domain, γ ∈ (1, 2]. They form a specific class of Lévy trees (introduced by Le Gall and Le Jan in [24]) and the Brownian case γ = 2 corresponds to Aldous Continuum Random Tree (CRT). In this paper, we study fine properties of the ma...

SiCN Amorphous Materials Chemical Vapour Deposited Using the Si(CH3)4-NH3-H2 System

Elaboration of amorphous SiCPc: materials was performed using a conventional thermaly activated CVD at 100012003C from the '1MS-NH3-H2 system. 'I'he influence on the deposition rate and the composition was investigated using an experimental design by varq-ing: deposition temperature, pressure and hTb flow rate. A set of 16 samples SiCxNy with x!y ranged from 0.0.1. to 1.69 was prepared. .4ccura...

Lemierre's syndrome: a rare clinical condition diagnosed, exceptionally, by imaging.

Environmental dust effects on aluminum surfaces in humid air ambient

Environmental dusts settle on surfaces and influence the performance of concentrated solar energy harvesting devices, such as aluminum troughs. The characteristics of environmental dust and the effects of mud formed from the dust particles as a result of water condensing in humid air conditions on an aluminum wafer surface are examined. The dissolution of alkaline and alkaline earth compounds i...