1. Hordhac

Zinc telluride (ZnTe) waa walax muhiim ah oo ah semiconductor-ka kooxda II-VI oo leh qaab-dhismeed toos ah oo bandgap ah. Heerkulka qolka, bandgap-kiisu waa qiyaastii 2.26eV, wuxuuna ka helaa codsiyo ballaaran aaladaha optoelectronic, unugyada qorraxda, dareemayaasha shucaaca, iyo meelaha kale. Maqaalkani wuxuu bixin doonaa hordhac faahfaahsan oo ku saabsan hababka isku-darka kala duwan ee zinc telluride, oo ay ku jiraan falcelinta xaaladda adag, gaadiidka uumiga, hababka ku salaysan xalka, epitaxy-ga molecular beam, iwm. Hab kasta si fiican ayaa loo sharxi doonaa marka la eego mabaadi'diisa, habraacyadiisa, faa'iidooyinka iyo khasaarooyinka, iyo tixgelinta muhiimka ah.

2. Habka Falcelinta Xaaladda Adag ee ZnTe Synthesis

2.1 Mabda'a

Habka falcelinta xaaladda adag waa habka ugu dhaqameed ee loo diyaariyo zinc telluride, halkaas oo zinc iyo tellurium-ka saafiga ah ay si toos ah uga falceliyaan heerkulka sare si ay u sameeyaan ZnTe:

Zn + Te → ZnTe

2.2 Habka Faahfaahsan

2.2.1 Diyaarinta Walxaha Cayriin

1. Xulashada Agabka: Isticmaal granules zinc ah oo saafi ah iyo buruqyo tellurium ah oo saafi ah ≥99.999% sidii agab bilow ah.
2. Daaweynta Kahor:
   • Daawaynta Zinc: Marka hore ku dhex quus aashitada hydrochloric acid (5%) muddo 1 daqiiqo ah si aad uga saarto oksaydhka dusha sare, ku raaci biyo la qalajiyey, ku dhaq ethanol aan biyo lahayn, ugu dambayntiina ku qallaji foorno faakiyuum ah oo heerkulkeedu yahay 60°C muddo 2 saacadood ah.
   • Daawaynta Tellurium: Marka hore ku dhex quus biyo-mareenka (HNO₃:HCl=1:3) muddo 30 ilbiriqsi ah si aad uga saarto oksaydhyada dusha sare, ku raaci biyo la miiray ilaa ay dhexdhexaad noqdaan, ku dhaq ethanol aan biyo lahayn, ugu dambayntiina ku qallaji foorno faakiyuum ah oo heerkulkeedu yahay 80°C muddo 3 saacadood ah.
3. Miisaanka: Miisaanka walxaha ceeriin ku miisaami saamiga stoichiometric (Zn:Te=1:1). Marka la eego suurtagalnimada isbeddelka zinc heerkulka sare, waxaa lagu dari karaa 2-3% dheeraad ah.

2.2.2 Isku-darka Waxyaabaha

1. Shiidi iyo Isku-darka: Ku rid zinc iyo tellurium-ka miisaanka leh hoobiye agate ah oo ku shiid 30 daqiiqo sanduuq galoofis oo argon ah ilaa ay si isku mid ah isugu qasan yihiin.
2. Kala-saarista: Budada isku dhafan ku rid qaab oo ku cadaadi qolof leh dhexroor 10-20mm ah oo ka hooseeya cadaadiska 10-15MPa.

2.2.3 Diyaarinta Maraakiibta Falcelinta

1. Daawaynta Tuubada Quartz: Dooro tuubooyinka quartz-ka ee saafiga ah (dhexroorka gudaha 20-30mm, dhumucda derbiga 2-3mm), marka hore ku qoyso biyaha aqua regia 24 saacadood, si fiican ugu raaci biyo la dhalaaliyay, oo ku qalaji foorno heerkulkeedu yahay 120°C.
2. Daadgureynta: Ku rid walxaha ceeriin ah tuubada quartz-ka, ku xidh nidaamka faakiyuumka, oo u daadgureyso ilaa ≤10⁻³Pa.
3. Shaabadeynta: Ku xidh tuubada quartz-ka adigoo isticmaalaya olol haydarojiin-ogsajiin ah, adigoo hubinaya dherer shaabadaysan oo ≥50mm ah si hawo-qaboojintu u adkaato.

2.2.4 Falcelinta Heerkulka Sare

1. Marxaladda Kuleylka Koowaad: Dhig tuubada quartz ee la shaabadeeyey foorno tuubo ah oo ku kululee 400°C heer ah 2-3°C/daqiiqo, adigoo haynaya 12 saacadood si loogu oggolaado falcelinta bilowga ah ee u dhaxaysa zinc iyo tellurium.
2. Marxaladda Kuleylka Labaad: Kuleylka sii wad ilaa 950-1050°C (ka hooseeya barta jilitaanka quartz ee 1100°C) 1-2°C/daqiiqo, adigoo haynaya 24-48 saacadood.
3. Ruxitaanka Tuubada: Inta lagu jiro marxaladda heerkulka sare, foornada u leexi 45° labadii saacadoodba mar oo dhowr jeer rux si aad u hubiso in si fiican loo isku daro falgalayaasha.
4. Qaboojinta: Ka dib marka falcelinta la dhammeeyo, si tartiib ah u qabooji heerkulka qolka 0.5-1°C/daqiiqo si looga hortago dildilaaca muunadda oo ay ugu wacan tahay cadaadiska kulaylka.

2.2.5 Habaynta Badeecada

1. Ka saarista Alaabta: Fur tuubada quartz sanduuqa galoofyada oo ka saar badeecada falcelinta.
2. Shiidi: Ku celi badeecada budo si aad uga saarto walxaha aan falcelinta lahayn.
3. Ku-buufinta: Ku buufi budada heerkul ah 600°C jawiga argon muddo 8 saacadood ah si aad u yareyso walbahaarka gudaha oo aad u hagaajiso bilicda.
4. Sifeynta: Samee XRD, SEM, EDS, iwm., si aad u xaqiijiso daahirnimada marxaladda iyo halabuurka kiimikada.

2.3 Hagaajinta Halbeegga Habka

1. Xakamaynta Heerkulka: Heerkulka falcelinta ugu fiican waa 1000±20°C. Heerkulka hoose wuxuu keeni karaa falcelin aan dhammaystirnayn, halka heerkulka sare uu sababi karo isbeddel ku yimaada zinc.
2. Xakamaynta Waqtiga: Waqtiga haynta waa inuu ahaadaa ≥24 saacadood si loo hubiyo falcelin dhammaystiran.
3. Heerka Qaboojinta: Qaboojinta gaabiska ah (0.5-1°C/daqiiqo) waxay keentaa badar weyn oo kiristaal ah.

2.4 Falanqaynta Faa'iidooyinka iyo Khasaarooyinka

Faa'iidooyinka:

• Habka fudud, shuruudaha qalabka oo hooseeya
• Ku habboon wax soo saarka dufcadda
• Nadiifnimo sare oo wax soo saar ah

Qasaarooyinka:

• Heerkulka falcelinta sare, isticmaalka tamarta sare
• Qaybinta cabbirka hadhuudhka ee aan isku mid ahayn
• Waxay ku jiri kartaa xaddi yar oo walxo aan falcelin lahayn

3. Habka Gaadiidka Uumiga ee loogu talagalay Isku-darka ZnTe

3.1 Mabda'a

Habka uumiga wuxuu adeegsadaa gaas side si uu u qaado uumiga falgalka una geeyo aag heerkul hooseeya si loogu kaydiyo, isagoo gaaraya koboc jiho ah oo ZnTe ah isagoo xakameynaya heerarka heerkulka. Iodine waxaa badanaa loo isticmaalaa wakiilka gaadiidka:

ZnTe(yada) + I₂(g) ⇌ ZnI₂(g) + 1/2Te₂(g)

3.2 Habka Faahfaahsan

3.2.1 Diyaarinta Walxaha Cayriin

1. Xulashada Agabka: Isticmaal budada ZnTe oo saafi ah (daahirnimo ≥99.999%) ama budada Zn iyo Te oo isku dhafan oo isku dhafan.
2. Diyaarinta Wakiilka Gaadiidka: Kiniiniyada iodine-ka ee saafiga ah (daahir ahaan ≥99.99%), qiyaasta mugga tuubada falgalka 5-10mg/cm³.
3. Daaweynta Tuubada Quartz: Waxay la mid tahay habka falcelinta xaaladda adag, laakiin tuubooyinka quartz ee dheer (300-400mm) ayaa loo baahan yahay.

3.2.2 Rarista Tuubada

1. Meelaynta Agabka: Dhig budada ZnTe ama isku darka Zn+Te dhinac ka mid ah tuubada quartz.
2. Ku darista Iodine: Ku dar kiristaalka iodine tuubada quartz-ka sanduuqa galoofyada.
3. Daadgureynta: U daadgureynta ilaa ≤10⁻³Pa.
4. Shaabadeynta: Ku shaabad olol haydarojiin-ogsajiin ah, adigoo tuubada ka dhigaya mid jiifa.

3.2.3 Dejinta Heerkulka Heerkulka

1. Heerkulka Aagga Kulul: Loo dejiyay 850-900°C.
2. Heerkulka Aagga Qabow: Loo dejiyay 750-800°C.
3. Dhererka Aagga Gradient: Qiyaastii 100-150mm.

3.2.4 Geedi socodka Kobaca

1. Marxaladda Koowaad: Kuleyli ilaa 500°C heerkul ah 3°C/daqiiqo, hay 2 saacadood si aad u oggolaato falcelinta bilowga ah ee u dhaxaysa iodine iyo walxaha ceeriin.
2. Marxaladda Labaad: Kuleylinta sii wad ilaa heerkulka la dejiyay, ilaali heerka heerkulka, oo kor u kac 7-14 maalmood.
3. Qaboojinta: Ka dib marka uu koritaanku dhammaado, qabooji heerkulka qolka 1°C/daqiiqo.

3.2.5 Ururinta Badeecadaha

1. Furitaanka Tuubada: Fur tuubada quartz-ka sanduuqa galoofyada.
2. Ururinta: Ururi kiristaalo keli ah oo ZnTe ah dhammaadka qabow.
3. Nadiifin: Ku nadiifi ethanol aan biyo lahayn 5 daqiiqo si aad uga saarto iodine-ka ku nuugaya dusha sare.

3.3 Qodobbada Xakamaynta Habka

1. Xakamaynta Tirada Iodine: Fiirsashada Iodine waxay saamaysaa heerka gaadiidka; heerka ugu habboon waa 5-8mg/cm³.
2. Heerkulka Heerka: Ku hay heerka heerkulka gudaha 50-100°C.
3. Waqtiga Kobaca: Caadi ahaan 7-14 maalmood, iyadoo ku xiran cabbirka kiristaalka ee la rabo.

3.4 Falanqaynta Faa'iidooyinka iyo Khasaarooyinka

Faa'iidooyinka:

• Kiristaal hal tayo sare leh ayaa la heli karaa
• Cabbirrada kiristaalka ee waaweyn
• Daahirnimo sare

Qasaarooyinka:

• Wareegyada koritaanka dheer
• Shuruudaha qalabka sare
• Wax soo saar hooseeya

4. Habka Ku Salaysan Xalka ee Isku-darka Nanomaterial-ka ZnTe

4.1 Mabda'a

Hababka ku salaysan xalka ayaa xakameeya falcelinta horudhaca ah ee xalka si loo diyaariyo nanoparticles-ka ZnTe ama nanowires-ka. Falcelinta caadiga ah waa:

Zn²⁺ + HTe⁻ + OH⁻ → ZnTe + H₂O

4.2 Habka Faahfaahsan

4.2.1 Diyaarinta Wakiilka Dib-u-warshadaynta

1. Isha Zinc: Zinc acetate (Zn(CH₃COO)₂·2H₂O), daahirnimo ≥99.99%.
2. Isha Tellurium: Tellurium dioxide (TeO₂), daahirnimo ≥99.99%.
3. Wakiilka Yareeya: Sodium borohydride (NaBH₄), daahirnimo ≥98%.
4. Waxyaabaha milma: Biyaha la baabi'iyay, ethylenediamine, ethanol.
5. Daawaynta: Cetyltrimethylammonium bromide (CTAB).

4.2.2 Diyaarinta Horudhaca Tellurium

1. Diyaarinta Xalka: Ku mil 0.1mmol TeO₂ 20ml oo biyo nadiif ah.
2. Falcelinta Yaraynta: Ku dar 0.5mmol NaBH₄, si birlab ah u walaaq 30 daqiiqo si aad u soo saarto xalka HTe⁻.
   TeO₂ + 3BH₄⁻ + 3H₂O → HTe⁻ + 3B(OH)₃ + 3H₂↑
3. Jawiga Ilaalinta: Hagaajinta socodka nitrogen-ka oo dhan si looga hortago oksaydheynta.

4.2.3 Isku-darka Nanoparticle-ka ZnTe

1. Diyaarinta Xalka Zinc: Ku milmi 0.1mmol zinc acetate 30ml ethylenediamine.
2. Falcelinta Isku-dhafka: Si tartiib ah ugu dar xalka HTe⁻ xalka zinc-ka, ka falceli heerkul ah 80°C muddo 6 saacadood ah.
3. Centrifugation: Ka dib falcelinta, centrifuge ku samee 10,000rpm muddo 10 daqiiqo ah si aad u soo ururiso badeecada.
4. Dhaqidda: Ku dhaqidda ethanol iyo biyo la dhalaaliyay saddex jeer.
5. Qallajinta: Ku qalaji faakiyuum heerkul ah 60°C muddo 6 saacadood ah.

4.2.4 ZnTe Nanowire Synthesis

1. Ku darista Tusaalaha: Ku dar 0.2g CTAB xalka zinc-ka.
2. Falcelinta Hydrothermal: Xalka isku dhafan ku wareeji autoclave 50ml ah oo Teflon-lined ah, ka falceli heerkul ah 180°C muddo 12 saacadood ah.
3. Ka-dib-u-habaynta: Sida nanoparticles-ka.

4.3 Hagaajinta Halbeegga Habka

1. Xakamaynta Heerkulka: 80-90°C nanoparticles-ka, 180-200°C nanowires-ka.
2. Qiimaha pH: Ku hay inta u dhaxaysa 9-11.
3. Waqtiga Falcelinta: 4-6 saacadood oo loogu talagalay nanoparticles, 12-24 saacadood oo loogu talagalay nanowires.

4.4 Falanqaynta Faa'iidooyinka iyo Khasaarooyinka

Faa'iidooyinka:

• Falcelin heerkul hoose, tamar badbaadinaysa
• Qaab-dhismeedka iyo cabbirka la xakamayn karo
• Ku habboon wax soo saarka baaxadda weyn

Qasaarooyinka:

• Badeecooyinku waxay ka koobnaan karaan wasakho
• Waxay u baahan tahay dib-u-habayn
• Tayada kiristaalka oo hooseysa

5. Molecular Beam Epitaxy (MBE) oo loogu talagalay Diyaarinta Filimka khafiifka ah ee ZnTe

5.1 Mabda'a

MBE waxay korisaa filimada khafiifka ah ee ZnTe ee hal-kiristaal ah iyadoo hagaysa fallaadhaha molecular-ka ee Zn iyo Te substrate-ka iyadoo ku jirta xaalad faaruq ah oo aad u sareysa, iyadoo si sax ah u xakameysa saamiga qulqulka fallaadhaha iyo heerkulka substrate-ka.

5.2 Habka Faahfaahsan

5.2.1 Diyaarinta Nidaamka

1. Nidaamka Faakuumka: Faakuumka saldhigga ah ≤1×10⁻⁸Pa.
2. Diyaarinta Isha:
   • Isha Zinc: Zinc saafi ah oo 6N ah oo ku jira BN crucible.
   • Isha Tellurium: Tellurium saafi ah oo 6N ah oo ku jira PBN crucible.
3. Diyaarinta Substrate-ka:
   • Substrate-ka GaAs (100) ee si caadi ah loo isticmaalo.
   • Nadiifinta dhulka hoostiisa: Nadiifinta dareeraha dabiiciga ah → Qallajinta aashitada → Biyo raacinta biyaha ee la shaandheeyo → qalajinta nitrogen.

5.2.2 Geedi socodka Kobaca

1. Gaaska Substrate-ka: Ku dub 200°C muddo 1 saac ah si aad uga saarto nuugayaasha dusha sare.
2. Ka saarista oksaydhka: Kuleyli ilaa 580°C, hayso 10 daqiiqo si aad uga saarto oksaydhka dusha sare.
3. Kobaca Lakabka Kaydka: Qabooji ilaa 300°C, kor u qaad lakabka kaydka 10nm ee ZnTe.
4. Kobaca ugu Weyn:
   • Heerkulka dhulka hoostiisa: 280-320°C.
   • Cadaadis u dhigma fallaadhaha Zinc: 1×10⁻⁶ Torr.
   • Cadaadis u dhigma fallaadhaha Tellurium: 2×10⁻⁶ Torr.
   • Saamiga V/III oo lagu xakameeyay 1.5-2.0.
   • Heerka kobaca: 0.5-1μm/saacaddii.
5. Qaboojinta: Ka dib marka uu kordho, ku rid heerkul ah 250°C muddo 30 daqiiqo ah.

5.2.3 Kormeerka Gudaha

1. Kormeerka RHEED: U kuurgalka waqtiga dhabta ah ee dib u dhiska dusha sare iyo qaabka koritaanka.
2. Cabbirka Culus: La soco xoojinta fallaadhaha molecular-ka.
3. Heerkulbeegga Infrared-ka: Xakamaynta heerkulka substrate-ka saxda ah.

5.3 Qodobbada Xakamaynta Habka

1. Xakamaynta Heerkulka: Heerkulka dhulka hoostiisa ku jira wuxuu saameeyaa tayada kiristaalka iyo qaab-dhismeedka dusha sare.
2. Saamiga Dareeraha ee Beam Flux: Saamiga Te/Zn wuxuu saameeyaa noocyada cilladaha iyo xoogga.
3. Heerka Kobaca: Heerarka hoose waxay hagaajiyaan tayada kiristaalka.

5.4 Falanqaynta Faa'iidooyinka iyo Khasaarooyinka

Faa'iidooyinka:

• Halabuurka saxda ah iyo xakamaynta doping-ka.
• Filimaan tayo sare leh oo hal-kiristaal ah.
• Sagxadaha siman ee atomiga ah ayaa la gaari karaa.

Qasaarooyinka:

• Qalab qaali ah.
• Heerarka kobaca oo gaabis ah.
• Waxay u baahan tahay xirfado hawlgal oo horumarsan.

6. Hababka Kale ee Isku-dhafka

6.1 Kaydinta Uumiga Kiimikada (CVD)

1. Hordhacayaasha: Diethylzinc (DEZn) iyo diisopropyltelluride (DIPTe).
2. Heerkulka Falcelinta: 400-500°C.
3. Gaaska Xamuulka qaada: Naytrojiin ama haydarojiin saafi ah oo sare.
4. Cadaadis: Hawada ama cadaadis hoose (10-100Torr).

6.2 Uumi-baxa Kulaylka

1. Isha Maaddada: Budada ZnTe oo saafi ah.
2. Heerka faakuumka: ≤1×10⁻⁴Pa.
3. Heerkulka Uumiga: 1000-1100°C.
4. Heerkulka Substrate-ka: 200-300°C.

7. Gunaanad

Habab kala duwan ayaa jira oo loogu talagalay isku-darka zinc telluride, mid walbana wuxuu leeyahay faa'iidooyin iyo khasaarooyin u gaar ah. Falcelinta xaaladda adag waxay ku habboon tahay diyaarinta walxaha badan, gaadiidka uumiga wuxuu soo saaraa kiristaalo hal tayo sare leh, hababka xalka ayaa ku habboon nanomaterials, MBE-na waxaa loo isticmaalaa filimada khafiifka ah ee tayada sare leh. Codsiyada wax ku oolka ah waa inay doortaan habka ku habboon iyadoo lagu saleynayo shuruudaha, iyadoo si adag loo xakameynayo xuduudaha habka si loo helo agabka ZnTe ee waxqabadka sare leh. Tilmaamaha mustaqbalka waxaa ka mid ah isku-darka heerkulka hooseeya, xakamaynta qaab-dhismeedka, iyo hagaajinta habka doping.