Tervisepsühholoogia: psühholoogi roll vähiravis

Vähidiagnoos, aga ka muu raske kroonilise haiguse diagnoos on šokk nii täiskasvanule, lapsele kui ka nende lähedastele. Sõltuvalt patsiendi taustsüsteemist ja tugivõrgustiku või perekonna tugevusest võib psühholoogiline tugi olla äärmiselt vajalik nii diagnoosi saamise järel, raviperioodil kui ka pärast ravi lõppu. Artiklis on antud teaduskirjanduse põhjal ülevaade vähihaigete laste ja täiskasvanute vaimse tervise probleemkohtadest, kirjeldatud psühholoogilise toe praegust olukorda Eestis ning käsitletud patsientide muresid, millega puutuvad igapäevaselt kokku kahe onkoloogiaosakonna psühholoogid. Eesti Arst 2018; 97(6):319–325 &nbsp

Effect of the Phosphorus Gettering on Si Heterojunction Solar Cells

To improve the efficiency of crystalline silicon solar cells, should be collected the excess carrier as much as possible. Therefore, minimizing the recombination both at the bulk and surface regions is important. Impurities make recombination sites and they are the major reason for recombination. Phosphorus (P) gettering was introduced to reduce metal impurities in the bulk region of Si wafers and then to improve the efficiency of Si heterojunction solar cells fabricated on the wafers. Resistivity of wafers was measured by a four-point probe method. Fill factor of solar cells was measured by a solar simulator. Saturation current and ideality factor were calculated from a dark current density-voltage graph. External quantum efficiency was analyzed to assess the effect of P gettering on the performance of solar cells. Minority bulk lifetime measured by microwave photoconductance decay increases from 368.3 to 660.8 mu s. Open-circuit voltage and short-circuit current density increase from 577 to 598 mV and 27.8 to 29.8mA/cm(2), respectively. The efficiency of solar cells increases from 11.9 to 13.4%. P gettering will be feasible to improve the efficiency of Si heterojunction solar cells fabricated on P-doped Si wafers.open1