Pentavalent impurities Impurity atoms with 5 valence electrons produce n-type semiconductors by contributing extra electrons. Trivalent impurities Impurity atoms with 3 valence electrons produce p-type semiconductors by producing a  hole  or electron deficiency.he Doping of Semiconductors. The addition of a small percentage of foreign atoms in the regular crystal lattice of silicon or germanium produces dramatic changes in their electrical properties, producing n-type and p-type semiconductors.
Vienna: Annual Weather Averages. July is the hottest month in Vienna with an average temperature of 19Â°C (66Â°F) and the coldest is January at -1Â°C (30Â°F) with the most daily sunshine hours at 9 in July. The wettest month is June with an average of 74mm of rain. Loading weather data.
Weather in Austria in August. The average maximum daytime temperature in Austria in August is a warm 25Â°C (77Â°F). There are usually 7 hours of bright sunshine each day, which represents 51% of the 14 hours of daylight. Expect 61mm (2.4 inches) of rainfall across the whole of August with 12 days with some rain falling. Maximum UV levels will be high (6 UV index) at midday when the skies are clear. The average night-time temperature is usually a comfortable 15Â°C (59Â°F). The weather in Austria in August is represented by Vienna.