A study of silicon Schottky diode structures for NOx gas detection

Influence of alkali metallization (Li, Na and K) on photoluminescence properties of porous silicon

“…The PS samples which were dried in vacuum were coated with alkali metals by We present results for alkali metallization effects on photoluminescence (PL) properties of porous silicon (PS). The metallization of PS was realized by immersion plating in solutions containing 3 mM LiNO 3 , KNO 3 and NaNO 3 metal salts. The surface bond configuration of PS was monitored by Fourier transmission infrared spectroscopy (FTIR) and it was found that the PS surface was oxidized after metallization.…”

“…Several studies have addressed the problem of enhancement and stabilization of PS luminescence with different surface treatments as it is known that PS luminescence is strongly related with spaces on the surface. Hence, efforts to obtain stable surface species have led to the discovery of several chemical methods to functionalize Si surfaces [3][4][5][6][7][8][9][10]. However, there is still a pressing need for further investigation such as surface modification of the PS surface with some metal atoms leading to a definitive explanation of the origin of the PL and to more chemically stable PS surfaces.…”

“…It is important to deposit metals and change chemical composition of the PS surface with metal atoms to form a good electrical contact for microelectronics and photo electronics [3]. Metals can be deposited onto the PS surface by various methods such as sputtering or chemical vapour deposition.…”

Nanocrystalline Porous Silicon

“…An amorphous silicon on silicon structure, similar to the PS-Si system was reported for alcohol sensor (Sueva et al, 2002). Zhang et al (Zhang et al, 2000) reported NO X sensor with a PdPt/PS/Al (MIS) structure with higher response than Pd-Pt/Si/Al configuration but with longer response time. V.G.…”

Gas Sensitivity of the Structures With Porous Silicon Layer Modified by Metal

“…³äîìî, ùî ïîðèñòèé êðåìí³é (ÏÊ) º ïåðñ-ïåêòèâíèì ìàòåð³àëîì äëÿ ñòâîðåííÿ àäñîðá-ö³éíî àêòèâíèõ ñòðóêòóð íà éîãî îñíîâ³ [1][2][3]. Öüîìó ñïðèÿº âåëèêà ïèòîìà ïëîùà ïîâåðõí³ ÏÊ (200-500 ì 2 /cì 3 ) ³ éîãî âèñîêà õ³ì³÷íà àê-òèâí³ñòü, ÿêà ï³äñèëþº àäñîðáö³éí³ âëàñòèâîñò³ äàíèõ ñòðóêòóð.…”