A Promising Thermodynamic Study of Hole Transport Materials to Develop Solar Cells: 1,3-Bis(-carbazolyl)benzene and 1,4-Bis(diphenylamino)benzene.

The thermochemical study of the 1,3-bis(-carbazolyl)benzene (NCB) and 1,4-bis(diphenylamino)benzene (DAB) involved the combination of combustion calorimetric (CC) and thermogravimetric techniques. The molar heat capacities over the temperature range of (274.15 to 332.

Experimental results on piston detection by using the classical Ronchi test.

We present some experimental results of piston detection by using a classical Ronchi test in a segmented spherical surface. We compare the Ronchi fringes frequency of both segments (reference and under test). When the piston term is present at the segment under test, it is moved iteratively until we obtain a minimum piston error.

Water jet: a promising method for cutting optical glass.

We present an alternative method for cutting optical glass. It works with a high-pressure fluid, carring abrasive powder. This technique offers some advantages over conventional methods that use diamond abrasive covered wires or disks.