302 circuits Practical electronic circuits for the home - download pdf or read online

301 circuit. Vol. three КНИГИ ;АППАРАТУРА Название: 301 circuit. Vol. 3Издательство: Elektor Количество страниц: eighty five Формат: PDF Размер файла: 16.8 Mb Язык: EnglishСборник схем журнала Elektor.com . zero

Show description

Read Online or Download 302 circuits Practical electronic circuits for the home constructor PDF

Best physics books

Additional info for 302 circuits Practical electronic circuits for the home constructor

Sample text

W. BOER and a very thick (d 2 > Ln) p-type base which is not protected from surface recombination at the back electrode. The set of solution curves is plotted in Fig. 19 for open circuit conditions. 10- 5 cm (see arrow 6rt top for emphasis) in order to show the behaviour in the bulk, which contains several interesting features. 2 FIG. VES FOR AN a-Si IN FIG. 16 HOWEVER, FOR LOW COMPENSATION (Ndl = 1016 CM -3) WITH THE TOTAL CURRENT AS FAMILY PARAMETER FOR J = 0,-10, 13, -15 AND -18 mA/cm 2FOR CURVES 1-5 RESPECTIVELY 37 SOLAR CELL THEORY 24, C ...

Igqing the cell geometry radically. cause of grid shading from the top' * More efficient solar cells ar. produced by making the region of major generation of minority carriers . ion length. which is responsible for cariercollection. 0 suns [16] and recently 27% at 900 suns [2]. 46 K. BOER electrode. ction is lost because of recombination at the extended back contact. Both losses can be eliminated or substantially reduced by alternatingly providing carrier collection via small n+ and p+ type "dots" at the back-side of the device [15J with alternating metal contacts, as shown schematically in Fig 6+.

_. CROSS-SECTION; B:BAND MODEL OF A npp+Si SOLAR CELL AFTER FAHRENBRUCH AND BUBE [4]. 2 mm) cell to absorb most of the active height in the solar spectum (after using light trapping by appropriately structuring the surfaces). The geometry and band model of a typical npp~ -Si solar cell* is shown in Fig. 3. Sufficient doping of the base is necessary to permit a large open circuit voltage (the majority ~uasi-Fermi le~el for holes is then shifted close to the valence band-edge). In addition, a large lifetime of minority carriers is necessary to move the quasi-Fermi level for electrons close LATEST.

Download PDF sample

302 circuits Practical electronic circuits for the home constructor


by Richard
4.1

Rated 4.83 of 5 – based on 44 votes