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https://dx.doi.org/10.18721/jp...
Other literature type . 2022
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Morphology evolution of mesoporous silicon powder formed by Pd-assisted chemical etching at temperatures of 25 – 75 °C

Эволюция морфологии мезопористого порошка кремния, сформированного Pd-стимулированным химическим травлением при температурах 25-75 °C
Authors: Volovlikova, Olga; Silakov, Gennady; Gavrilov, Sergey; Lazorkina, Elena;

Morphology evolution of mesoporous silicon powder formed by Pd-assisted chemical etching at temperatures of 25 – 75 °C

Abstract

In this paper, we report the preparation of porous silicon powder by two-step Pd-assisted chemical etching with metallurgical grade polycrystalline silicon powder by varying the etching time from 30 to 90 minutes and solution temperature from 25 °C to 75 °C with and without thermal stabilization. A rapid temperature increase is observed with a maximum value of 95 – 100 °C in the case of etching without thermal stabilization. A high etching time of 90 minutes and a dissolution temperature above 50 °C have a negative effect on the formation of porous particles, which leads to the complete dissolution of silicon particles. The slow temperature growth for all initial temperatures in the case of the etching with thermal stabilization is observed. We established the positive effect of thermal stabilization in the process of etching on the thickness of the pores walls, reducing the uncontrollably growing rate of silicon etching, as a result, overetching of silicon.

В этой работе мы сообщаем о формировании порошка пористого кремния путем двухстадийного химического травления металлургического порошка поликристаллического кремния с использованием Pd путем изменения времени травления от 30 до 90 минут и температуры раствора от 25 до 75 ° C с термостабилизацией и без нее. Наблюдается быстрое повышение температуры с максимальным значением 95-100°C в случае травления без термостабилизации. Длительное время травления 90 минут и температура растворения выше 50°C оказывают негативное влияние на формирование пористых частиц, что приводит к их полному растворению. Наблюдается медленный рост температуры для всех начальных температур в случае травления с термостабилизацией. Показано положительное влияние термостабилизации в процессе травления на толщину стенок пор, снижающее неконтролируемо растущую скорость травления кремния, и как следствие, перетрав кремния.

Keywords

размер кристалла, Physics, QC1-999, porous silicon powder, температурно-временные зависимости, MACE, thermal stabilization, рамановская спектроскопия, crystal size, raman spectroscopy, Raman spectroscopy, QA1-939, temperature-time dependencies, порошок пористого кремния, mace, Mathematics, термостабилизация

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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