?a???s?as? t?? PowerPoint

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?T???? ???S???? ??????????? S???? ?F????S???O?
??T??????O? ??? F?S??O? ???S???O? S????????
F?S???S F?S??? ??? ???????S ?F????G?S ???
???????? ??? ??????G???? (ZnO) T????O??S
???GG???S ???????O? ????. ??T. ?.
?????????????
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?? T????? ??S ?????S??S?S

• G????? S??????? ??? ZnO
• 2. ????????S ??? ZnO
• ?F????G?S ??Y ZnO
• ?????????S ??? ??????????S ??????S??S

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1.G????? S??????? ??? ZnO ???µas?e? Chinese
white, zinc white, flowers of zinc, philosophers
wool ?????e?s? ????t? t?? ZnO ?e?da?????t??
(zincite) ?µ??f?
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?a?a???? t?? ??e?d??? t?? ?e?da?????? ???e?a?
???µa?a? ???µ??a???? ?a?a???? ??p?? epe?e??as?a?
t?? ?e?da?????t? ??a t?? pa?a???? t??
ZnO T??µa?s? ?e?da?????t? µe ??? (????a?a) se
p?e??asµa a??a Zn ½ O2 ? ZnO 348.5 kJ
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2. ????????S ??? ZnO 1. a) ?d????t? st? ?e??.
ß) ??a??t? se ???a ?a? ß?se??. 2. ?a?aµ??e?
?e??? pa?? t?? ???es? t?? st? ?d???e?? ? st??
?pe???d? a?t???ß???a. 3. St?? ???sta????? t??
µ??f? pa???s???eta? t? p?e????e?t???? fa???µe??.
4. F?t??e?µ??? ???s?. 5. ?p????d??? ??a t?
pe??ß?????.
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T?s? st?? ?e???d??? ???a?a t?? St???e??? ZnO ??
??e?d?? t?? ?e?da?????? e??a? µ?a ???s? t??
?µ?d?? II VI
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T?s? st?? ?e???d??? ???a?a t?? St???e??? ZnO

• Zn 30 ??e?t????a
• ?ata??µ? 30 Zn 1s2 2s2 2p6 3s2 3p6
  4s2 3d10
• 4? pe???d??
• 2? de?te?e???sa ?µ?da
• d ??µ?a? d
• ? 8 ??e?t????a
• ?ata??µ? 8? 1s2 2s2 2p4
• 2? pe???d??
• 246 6? ????a ?µ?da
• p ??µ?a? p

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?e??t? t?? ?µ???p?????? desµ?? t??
ZnO ??e?t?????? ?e???a s?????? Zn ??e?t???????
??p?? t?? st???e??? ?at? Lewis
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F?s??? ?a?a?t???st??? ?e???? t?? ZnO
???µa ?e???
F?s? Ste?e?
????a?? ????? 81,41 g/mol
?????t?ta 5.606 g/cm3
S?µe?? t???? 1975 ?C
S?µe?? ß?asµ?? ?C
???t?p? e??a?p?a s??µat?sµ?? ?Hf0 solid -348,0 kJ/mol
???t?p? µ???a?? e?t??p?a S0 solid 43,9 J/(?mol)
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???sta????? ??µ?

• ??µ? ?????????? ?at????(ed???e?t??µ??? ??ß???)
• (b) ??µ? Sfa?e??t? (ed???e?t??µ??? ??ß???)
• (c) ??µ? ????ts?t? (e?a??????)

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??µ? ????ts?t?
??e?µat???? sta?e??? a0 0.32495 nm c0
0.52069 nm
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• ?? ZnO ?? ?µ?a?????
• ????t?? ?a??? a????? t?? ??e?t??sµ??
• ?µ?a????? ?????? t?? ??e?t??sµ?? ?p?
  p???p???se??
• ??ta??a ?a??? a????? t?? ??e?t??sµ??

??e?t?????? d??ta?? ?µ?a????? se ?0 ? (a??ste??)
?a? se ?gt0 ? (de???)
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??e??e?a?? ??sµa
?? ??e?d?? t?? ?e?da?????? ??e? ?µes? e?e??e?a??
??sµa 3,4 eV
?µes? e?e??e?a?? ??sµa EC EC (k0)
?µµes? e?e??e?a?? ??sµa EC EC (k0)

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3. ?F????G?S ??Y ZnO a) S?µpa??? (bulk) gt100nm
(3 d?ast?se??) ß) ?ept?? ?µe???? (thin film)
50-2000nm (2,3 d?ast?se??) ?) ?aµ???d??stat? (low
dimensional) lt20nm 0 d?ast?se?? ?ßa?t???
s?µe?? (quantum dot) 1 d??stas??ßa?t??? ?a??d??
(quantum wire) 2 d?ast?se???ßa?t??? p???d?
(quantum well) d) S???? (powder)
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• ???S????
• ???µ??a??a e?ast????
• S??e?sf??? st? ??µ??? e?d???µ?s? t?? e?ast????
  ?a? st?? ap?t??p? t?? ???a?s?? ???? ?pe????µa?s??
  ?a? p?es??.
• ?p?t????s? t?? d?ad??as?a? s??????s?? t??
  e?ast????.
• ?p????f?s? t?? ?pe???d??? a?t???ß???a? µe
  ap?t??esµa t?? p??stas?a t?? e?ast???? ap? t??
  µa???????? ???es? t??? st?? ????.

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• ???S????
• ?a???? p??????a? ?d??t?t?? st?? t?µ?a t??
  p?ast????
• ?e?t??s? µ??a????? a?t???? t?? p?ast????
• ????s? t?? a??e?t???t?ta?
• ?e?t??s? ?e?µ???? a?t???? t?? p?ast????
• ????s? t?? a?t???? st? f?t??
• ???stas?a p?ast???? ap? t? f???? t?? ?????? ?a?
  t?? ?pe???d? a?t???ß???a

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•  
• ????????
• S??e?sf??? e??? µ??ad???? s??d?asµ?? ?d??t?t??
  st?? epe?e??as?a t?? ??a????
• ?e??s? t?? s??te?est? ?e?µ???? d?ast???? t??
  ??a????.
• ?p?d?s? ?????? ?aµp??t?ta? ?a? st??p??t?ta? st?
  ??a??.
• ?p?d?s? ?????? sta?e??t?ta? st? ??a?? ap??a?t?
  st?? pa?aµ??f?s? ??t? ap? p?es?.

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• ?????????? F?????O? ??? ?????????O?
• ?pt???? ?a? ß????µ???? ?d??t?te? t?? ZnO
• ??d??? ?a?a?t???st??? se µ?a p??????a fa?µ????
  ?a? ?a????t????
• ?p????f?s? ?pe???d??? a?t???ß???a?
• ???stas?a d??µat?? ?a? p??s?p?? ap? t?? ????
• ?a? ap?f??? e??a?µ?t??.
• ?p?d?s? st?pt???? ?d??t?t?? ??a t?? ??e??? t??
  d??µat??.
• ?p?d?s? µ???t??t???? ?d??t?t??.

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• ????GOG? FO??????O?
• S??e?sf??? t?? f?t?a????µ?? ?a? ?µ?a????µ??
  ?d??t?t?? t?? ZnO (µ?s? t?? e?d???? ?e?µ?t?ta? ?/
  ?a? t?? eµp???t?sµ?? t?? µe d??f??a ???a
  st???e?a) st?? a???s? t?? a????µ?t?ta?.
• ???p?p???s? t?? ?pt???? ?d??t?t?? t?? ZnO (µe
  t?? p??s???? s???e???µ???? ???st???? ??s???, ??
  ?p??e? ap????f???ta? ap? t?? ep?f??e?a t?? ZnO )
  ??a t?? a???s? t?? ap????f?t???t?ta? t??
  a?t???ß???a? f?t?? st?? ??at? pe????? t??
  f?sµat??.

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• ?????????
• S??e?sf??? t?? ZnO ?a? t?? pa?a????? t?? st??
  a??pt??? t?? p???t?ta? t?? ??pa?t????
• ???s? t?? ZnO sta ??pa?t??? ??d?a t?? µ??a???
  a?t?????t?? µe s??p? t?? µe??s? t?? ??e?d?s?? ?a?
  t?? f?????.
• ?p?d?s? e?d???? ?d??t?t?? se p?????? t?p???
  ??pa?t???? ?a? ???s?? (ße?t??µ??? p??s?????s?).

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• ???G??S
• ZnO se ???a????? st??se?? ???? f?sµa
  ??µ????, ß????µ????, ?pt???? ?a? f?s????
  ?d??t?t?? ?e?t??s? p?????t?? st?
  ß??µ??a??a ???µ?t??.
• ?a??te?? ep???????, ?e???t?ta, ?a?a??te???
  ???µat???? t????
• ???e?t???t?ta ??a??et??? p??stas?a t??
  ats?????? ?atas?e??? ap? t? d??ß??s? se ?a???????
  atµ?sfa?????? s?????e? a??? ?a? se ?d?t??e?
  s?????e?.
• ??at???s? t?? f?te???t?ta? t?? ???µ?t?? pa?? t??
  pa???s?a ?a?sae???? t?? ?e???.

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• F????? ?S?G??O?
• ?? ZnO ?? s?stat??? sta f??t?a ts??????
  ?p?µ?????s? s???e???µ???? ??s??? ap? t?? ?ap??
  t?? ts??????.
• ?p?µ?????s? s?µa?t???? p?s?t?t?? ?d????a???? ?a?
  ?d???e??? ap? t?? ?ap?? t?? ts?????? ????? ?a
  ep??e??eta? ? ?e?s? t??.

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• ????????????? ????S
• ?? ZnO ?a? ta pa?????? t?? ??t??e?µe??
  e?te???? ??e??a? ??a p??pa?as?e?? ??s???
  ep?ß?ad??t???? f?t???.
• ???s? t?? ZnO st?? ?? ?a???sµ?? ???eµ? ??
  ep?ß?ad??t??? f?t???.
• ?e??e?t???t?ta d?af???? a?a?????? t?? ZnO, t??
  ß?????? ????? ?a? t?? aµµ???a? se p??asfa??
  ?f?sµata.

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• ZnO VARISTORS
• ZnO Varistors S?µa?t??? ???? st??
  p??stas?a ?????µ?t?? p?? ?e?t??????? se ??????
  ?e?µ???as?e? ? ?????? t?se?? (10 volt-e?at?µµ???a
  volt) ???? t?? ?e?aµ???? t?? f?s??
• ???stas?a ??e?t??????? ?????µ?t?? (??µp???te??)
• ???stas?a ?????µ?t?? ap? ?pe?f??t?s? se
  ß??µ??a??e? d?a??µ?? ??e?t????? e????e?a? ?a?
  µet?d?s?? p????f?????.
• ??e??????s? se µe???? ßa?µ? t?? e?e????a? t??
  ???st? ???? t?? ?e?aµ???? t?? f?s?? (d??f??a
  µe???? ?a? s??µata).

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FO??????????
?? ???a?? ??tta?? e??a? µ?a ?µ?a????µ? d??ta??
p?? µetat??pe? ta f?t???a ap? t?? ???? se
??e?t??sµ?.

• G?a??, ?p?st??µa
• ????ßda????, p?s? epaf?
• ?p????f?t?? (absorber) ?µ???? t?p?? p-
• CdS ep?f??e?a ?p?st??µat?? (Buffer layer)
  ?µ???? t?p?? n-
• ZnO, pa?????? (window layer) ?µ???? t?p?? n-

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• ?????????S ??? ??????????S ??????S??S
• ?) ?atas?e?? t?a???st?? ?ept?? d?afa??? f??µ
  (Transparent thin film transistor).

TTFT ßas?sµ??? se ZnO
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?) ?atas?e?? ???d?? e?p?µp?? f?t??(Light
Emitting Diode) p?? ?a e?p?µp??? st?? ?pe???d?
pe????? t?? f?sµat??.
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http//www.reade.com/Products/Oxides/zinc_oxide.ht
ml, Zinc Oxide Powerhttp//www.navbharat.co.in/
clients.htm. http//www.azom.com/details.asp,
Zinc Oxide (ZnO) Properties and
Applications http//www.en.wikipedia.org/wiki/Zn
O , Zinc Oxide. http//www.en.wikipedia.org/wik
i/ZnO , Zincite.  http//www.en.wikipedia.org/w
iki/ZnO , The Mineral Zincite.
http//www.VaristorTechnologyConsulting.htm,Zinc
Oxide Varistor Technology  http//www.answers.co
m/topic/zinc-oxide-ointment, Zinc-oxide
ointment.  http//www.answers.com/main,
zinc-oxide.   http//www.answers.com/topic
/, zinc-oxide.
??????G??F??
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