1. Intshayelelo

I-Zinc telluride (ZnTe) yinto ebalulekileyo ye-II-VI group semiconductor enesakhiwo se-bandgap ngqo. Kwiqondo lobushushu begumbi, i-bandgap yayo imalunga ne-2.26eV, kwaye ifumana usetyenziso olubanzi kwizixhobo ze-optoelectronic, iiseli zelanga, izixhobo zokubona imitha, kunye nezinye iinkalo. Eli nqaku liza kubonelela ngentshayelelo eneenkcukacha kwiinkqubo ezahlukeneyo zokwenziwa kwe-zinc telluride, kubandakanya ukusabela kwe-solid-state, ukuthuthwa komphunga, iindlela ezisekelwe kwisisombululo, i-molecular beam epitaxy, njl. Indlela nganye iya kuchazwa ngokupheleleyo ngokwemigaqo yayo, iinkqubo, iingenelo kunye nokungalungi, kunye nezinto ezibalulekileyo ekufuneka ziqwalaselwe.

2. Indlela yokusabela kwi-Solid-State ye-ZnTe Synthesis

2.1 Umgaqo

Indlela yokusabela ye-solid-state yeyona ndlela yendabuko yokulungiselela i-zinc telluride, apho i-zinc ecocekileyo kakhulu kunye ne-tellurium zisabela ngokuthe ngqo kumaqondo obushushu aphezulu ukuze zenze i-ZnTe:

I-Zn + Te → I-ZnTe

2.2 Inkqubo eneenkcukacha

2.2.1 Ukulungiswa kwezinto eziluhlaza

1. Ukukhetha Izinto: Sebenzisa iigranule ze-zinc ezicocekileyo kakhulu kunye namaqhuma e-tellurium acocekileyo ≥99.999% njengezinto zokuqala.
2. Unyango lwangaphambi kokusetyenziswa kwezinto:
   • Unyango lweZinc: Okokuqala faka kwi-hydrochloric acid enyibilikisiweyo (5%) umzuzu omnye ukuze ususe ii-oxides ezingaphezulu, uhlambe ngamanzi acocekileyo, uhlambe nge-anhydrous ethanol, uze ekugqibeleni womise kwi-vacuum oven kwi-60°C iiyure ezi-2.
   • Unyango lweTellurium: Okokuqala faka kwi-aqua regia (HNO₃:HCl=1:3) imizuzwana engama-30 ukususa ii-oxides eziphezulu, hlambulula ngamanzi acocekileyo de abe mdaka, uhlambe nge-anhydrous ethanol, uze ekugqibeleni womise kwi-vacuum oven kwi-80°C iiyure ezi-3.
3. Ubunzima: Linganisa izinto ezikrwada ngokwe-stoichiometric ratio (Zn:Te=1:1). Xa ucinga ngokuguquguquka kwe-zinc kumaqondo obushushu aphezulu, kunokongezwa i-2-3% engaphezulu.

2.2.2 Ukuxuba Izinto

1. Ukusila Nokuxuba: Beka i-zinc kunye ne-tellurium ezilinganisiweyo kwi-agate mortar uze usile imizuzu engama-30 kwibhokisi yeglavu egcwele i-argon ide ixutywe ngokulinganayo.
2. Ukucola: Beka umgubo oxutyiweyo kwisikhunta uze ucinezele ube ziipellets ezinobubanzi obuyi-10-20mm phantsi koxinzelelo lwe-10-15MPa.

2.2.3 Ukulungiswa kwesitya sokusabela

1. Unyango lweQuartz Tube: Khetha iityhubhu zequartz ezicocekileyo kakhulu (ububanzi bangaphakathi buyi-20-30mm, ubukhulu bodonga buyi-2-3mm), qala ngokucwilisa kwi-aqua regia iiyure ezingama-24, uhlambe kakuhle ngamanzi acocekileyo, uze womise kwi-oven kwi-120°C.
2. Ukufuduka: Beka iipellets zezinto eziluhlaza kwityhubhu ye-quartz, qhagamshela kwinkqubo yokufunxa, uze uzikhuphele kwi-≤10⁻³Pa.
3. Ukutywina: Vala ityhubhu ye-quartz usebenzisa ilangatye le-hydrogen-oxygen, uqinisekise ubude bokutywina obuyi-≥50mm ukuze umoya ungangeni.

2.2.4 Ukusabela kobushushu obuphezulu

1. Inqanaba Lokuqala Lokufudumeza: Beka ityhubhu ye-quartz evaliweyo kwisithando somlilo uze uyifudumeze iye kuma-400°C ngesantya se-2-3°C/min, uyibambe iiyure ezili-12 ukuze uvumele impendulo yokuqala phakathi kwe-zinc kunye ne-tellurium.
2. Inqanaba lesibini lokuFudumeza: Qhubeka ufudumeza ukuya kuthi ga kwi-950-1050°C (ngaphantsi kweqondo lokuthamba kwe-quartz eliyi-1100°C) kwi-1-2°C/min, ubambe iiyure ezingama-24-48.
3. Ukushukuma kweThubhu: Ngexesha lobushushu obuphezulu, jika isithando somlilo kwi-45° rhoqo emva kweeyure ezi-2 uze usishukumise izihlandlo ezininzi ukuqinisekisa ukuxubana kakuhle kwee-reactants.
4. Ukupholisa: Emva kokugqiba ukusabela, pholisa kancinci ukuya kubushushu begumbi kwi-0.5-1°C/min ukuthintela ukuqhekeka kwesampuli ngenxa yoxinzelelo lobushushu.

2.2.5 Ukucutshungulwa kweMveliso

1. Ukususwa kweMveliso: Vula ityhubhu ye-quartz kwibhokisi yeglavu uze ususe imveliso yokusabela.
2. Ukusila: Sila imveliso ibe ngumgubo ukuze ususe naziphi na izinto ezingashukumiyo.
3. Ukufunxa: Funxa umgubo kwi-600°C phantsi kwe-argon atmosphere kangangeeyure ezi-8 ukuze unciphise uxinzelelo lwangaphakathi kwaye uphucule ubukhristalo.
4. Ukuchazwa kweempawu: Yenza i-XRD, i-SEM, i-EDS, njl.njl., ukuqinisekisa ubunyulu besigaba kunye nokwakheka kweekhemikhali.

2.3 Ukwenziwa ngcono kweParameter yeNkqubo

1. Ulawulo lobushushu: Ubushushu obufanelekileyo bokusabela yi-1000±20°C. Ubushushu obuphantsi bunokubangela ukusabela okungaphelelanga, ngelixa ubushushu obuphezulu bunokubangela ukuguquguquka kwe-zinc.
2. Ulawulo Lwexesha: Ixesha lokubamba kufuneka libe ziiyure ezingaphezu kwama-24 ukuqinisekisa ukusabela ngokupheleleyo.
3. Izinga Lokupholisa: Ukupholisa kancinci (0.5-1°C/min) kuvelisa iinkozo ezinkulu zekristale.

2.4 Uhlalutyo lwezinto ezilungileyo nezingalunganga

Iingenelo:

• Inkqubo elula, iimfuno eziphantsi zezixhobo
• Ifanelekile kwimveliso yebhetshi
• Ubumsulwa bemveliso obuphezulu

Iingxaki:

• Ubushushu obuphezulu bokusabela, ukusetyenziswa kwamandla aphezulu
• Ukusasazwa kobungakanani beenkozo obungalinganiyo
• Isenokuba nezixa ezincinci zezinto ezingaphendulwanga

3. Indlela yokuThutha umphunga kwi-ZnTe Synthesis

3.1 Umgaqo

Indlela yokuthutha umphunga isebenzisa igesi yokuthwala ukuhambisa umphunga we-reactant ukuya kwindawo enobushushu obuphantsi ukuze ifunyanwe, ifezekise ukukhula kwe-ZnTe kwicala eliya kwicala ngokulawula i-gradients yobushushu. I-Iodine isetyenziswa kakhulu njenge-arhente yokuthutha:

ZnTe(s) + I₂(g) ⇌ ZnI₂(g) + 1/2Te₂(g)

3.2 Inkqubo eneenkcukacha

3.2.1 Ukulungiswa kwezinto eziluhlaza

1. Ukukhetha Izinto: Sebenzisa umgubo we-ZnTe ococekileyo kakhulu (ubumsulwa ≥99.999%) okanye umgubo we-Zn kunye ne-Te oxutywe nge-stoichiometrically.
2. Ukulungiswa kweArhente yoThutho: Iikristale ze-iodine ezicocekileyo kakhulu (ubumsulwa ≥99.99%), umthamo we-5-10mg/cm³ yomthamo wetyhubhu yokusabela.
3. Unyango lweQuartz Tube: Kuyafana nendlela yokusabela kwi-solid-state, kodwa kufuneka iityhubhu zequartz ezinde (300-400mm).

3.2.2 Ukulayisha ityhubhu

1. Ukubekwa kwezinto: Beka umgubo we-ZnTe okanye umxube we-Zn+Te kwelinye icala letyhubhu ye-quartz.
2. Ukongeza i-iodine: Yongeza iikristale ze-iodine kwityhubhu ye-quartz kwibhokisi yeglavu.
3. Ukufuduka: Phuma uye kuthi ga kwi-≤10⁻³Pa.
4. Ukutywina: Vala ngelangatye le-hydrogen-oxygen, ugcine ityhubhu ithe tyaba.

3.2.3 Useto lweGradient yoBushushu

1. Ubushushu beNdawo eshushu: Setha kwi-850-900°C.
2. Ubushushu beNdawo ebandayo: Setha kwi-750-800°C.
3. Ubude beNdawo yeGradient: Malunga ne-100-150mm.

3.2.4 Inkqubo yoKhula

1. Inqanaba Lokuqala: Fudumeza ukuya kuma-500°C kwi-3°C/min, yibambe iiyure ezi-2 ukuze uvumele impendulo yokuqala phakathi kwe-iodine nezinto eziluhlaza.
2. Inqanaba lesibini: Qhubeka ufudumeza ukuya kutsho kubushushu obumiselweyo, gcina i-gradient yobushushu, uze ukhule kangangeentsuku ezisi-7-14.
3. Ukuphola: Emva kokuba kugqityiwe ukukhula, pholisa ukuya kubushushu begumbi kwi-1°C/min.

3.2.5 Ukuqokelelwa kweeMveliso

1. Ukuvulwa kweThubhu: Vula ithubhu yequartz kwibhokisi yeglavu.
2. Ingqokelela: Qokelela iikristale ze-ZnTe ezingatshatanga ekupheleni okubandayo.
3. Ukucoca: Coca nge-ultrasonic nge-ethanol engangenisi amanzi imizuzu emi-5 ukuze ususe i-iodine efunxwe ngaphezulu.

3.3 Amanqaku oLawulo lweNkqubo

1. Ulawulo lweSixa se-Iodine: Uxinzelelo lwe-Iodine luchaphazela izinga lokuthuthwa; uluhlu olufanelekileyo yi-5-8mg/cm³.
2. I-Gradient yoBushushu: Gcina i-gradient ngaphakathi kwama-50-100°C.
3. Ixesha Lokukhula: Ngokwesiqhelo iintsuku ezisi-7-14, kuxhomekeke kubukhulu bekristale obufunwayo.

3.4 Uhlalutyo lwezinto ezilungileyo nezingalunganga

Iingenelo:

• Iikristale ezikumgangatho ophezulu zingafumaneka
• Ubukhulu obukhulu bekristale
• Ubunyulu obuphezulu

Iingxaki:

• Imijikelo yokukhula emide
• Iimfuno eziphezulu zezixhobo
• Imveliso ephantsi

4. Indlela Esekelwe Kwisisombululo Yokwenziwa Kwezinto Ezifana Nezinye Ze-ZnTe

4.1 Umgaqo

Iindlela ezisekelwe kwisisombululo zilawula iimpendulo zangaphambili kwisisombululo ukulungiselela ii-nanoparticles ze-ZnTe okanye ii-nanowires. Impendulo eqhelekileyo yile:

Zn²⁺ + HTe⁻ + OH⁻ → ZnTe + H₂O

4.2 Inkqubo eneenkcukacha

4.2.1 Ukulungiswa kweReagent

1. Umthombo weZinc: I-Zinc acetate (Zn(CH₃COO)₂·2H₂O), ubunyulu ≥99.99%.
2. Umthombo weTellurium: I-Tellurium dioxide (TeO₂), ubumsulwa ≥99.99%.
3. Iarhente yokunciphisa: iSodium borohydride (NaBH₄), ubumsulwa ≥98%.
4. Izinyibilikisi: Amanzi anyibilikisiweyo, i-ethylenediamine, i-ethanol.
5. I-Surfactant: I-Cetyltrimethylammonium bromide (CTAB).

4.2.2 Ukulungiswa kweTellurium Precursor

1. Ukulungiswa kwesisombululo: Nyibilikisa i-0.1mmol TeO₂ emanzini acocekileyo angama-20ml.
2. Ukunciphisa iNgxaki: Yongeza i-0.5mmol NaBH₄, uvuselele ngamandla kamagnethi imizuzu engama-30 ukuze wenze isisombululo se-HTe⁻.
   TeO₂ + 3BH₄⁻ + 3H₂O → HTe⁻ + 3B(OH)₃ + 3H₂↑
3. I-atmosphere ekhuselayo: Gcina ukuhamba kwe-nitrogen kuyo yonke indawo ukuze kuthintelwe ukungcoliswa.

4.2.3 Ukwenziwa kwe-ZnTe Nanoparticle

1. Ukulungiswa kwesisombululo seZinc: Nyibilikisa i-0.1mmol zinc acetate kwi-30ml ye-ethylenediamine.
2. Ukuxuba Impendulo: Yongeza kancinci kancinci isisombululo se-HTe⁻ kwisisombululo se-zinc, sabela kwi-80°C iiyure ezi-6.
3. Ukucocwa kwe-Centrifugation: Emva kokusabela, faka i-centrifuge kwi-10,000rpm imizuzu eli-10 ukuze uqokelele imveliso.
4. Ukuhlamba: Ukuhlamba ngenye indlela nge-ethanol kunye namanzi acocekileyo kathathu.
5. Ukomisa: Yomisa nge-vacuum kwi-60°C kangangeeyure ezi-6.

4.2.4 Ukwenziwa kwe-ZnTe Nanowire

1. Ukongeza iTemplate: Yongeza i-0.2g ye-CTAB kwisisombululo se-zinc.
2. I-Hydrothermal Reaction: Dlulisa isisombululo esixutyiweyo kwi-autoclave ene-Teflon engama-50ml, sabela kwi-180°C kangangeeyure ezili-12.
3. Emva kokucubungula: Kuyafana nakwi-nanoparticles.

4.3 Ukwenziwa ngcono kweParameter yeNkqubo

1. Ulawulo lobushushu: 80-90°C kwii-nanoparticles, 180-200°C kwii-nanowires.
2. Ixabiso le-pH: Gcina phakathi kwe-9-11.
3. Ixesha Lokuphendula: iiyure ezi-4-6 zee-nanoparticles, iiyure ezili-12-24 zee-nanowires.

4.4 Uhlalutyo lwezinto ezilungileyo nezingalunganga

Iingenelo:

• Ukusabela okuphantsi kobushushu, ukonga amandla
• Imo elawulekayo kunye nobukhulu
• Ifanelekile kwimveliso enkulu

Iingxaki:

• Iimveliso zinokuba nokungcola
• Ifuna ukucutshungulwa emva kokulungiswa
• Umgangatho wekristale ophantsi

5. I-Molecular Beam Epitaxy (MBE) yoLungiselelo lweFilimu eThin yeZnTe

5.1 Umgaqo

I-MBE ikhulisa iifilimu ezibhityileyo ze-ZnTe ezinekristale enye ngokuyalela imisebe ye-molecular ye-Zn kunye ne-Te kwi-substrate phantsi kweemeko eziphezulu kakhulu ze-vacuum, ilawula ngokuchanekileyo i-beam flux ratios kunye nobushushu be-substrate.

5.2 Inkqubo eneenkcukacha

5.2.1 Ukulungiswa kweNkqubo

1. Inkqubo yoVutha: Isiseko soVutha ≤1×10⁻⁸Pa.
2. Ukulungiswa koMthombo:
   • Umthombo weZinc: 6N i-zinc ecocekileyo kakhulu kwi-BN crucible.
   • Umthombo weTellurium: I-tellurium ecocekileyo kakhulu ye-6N kwi-PBN crucible.
3. Ukulungiswa kwe-substrate:
   • I-substrate yeGaAs(100) esetyenziswa rhoqo.
   • Ukucoca i-substrate: Ukucoca i-organic solvent → i-asidi etyumkileyo → ukuhlamba ngamanzi acocekileyo → ukomisa i-nitrogen.

5.2.2 Inkqubo yoKhula

1. Ukugalela igesi kwi-substrate: Bhaka kwi-200°C kangangeyure e-1 ukuze ususe izinto ezibangela ukuba umphezulu ungabi namdla.
2. Ukususwa kwe-Oxide: Fudumeza ukuya kuma-580°C, yibambe imizuzu eli-10 ukuze ususe ii-oxides ezingaphezulu.
3. Ukukhula kweLayer yeBuffer: Kupholile ukuya kuthi ga kwi-300°C, khulisa umaleko we-buffer we-10nm ZnTe.
4. Ukukhula Okuphambili:
   • Ubushushu be-substrate: 280-320°C.
   • Uxinzelelo olulinganayo lomqadi weZinc: 1×10⁻⁶Torr.
   • Uxinzelelo olulinganayo lomqadi weTellurium: 2×10⁻⁶Torr.
   • Umlinganiselo we-V/III ulawulwa kwi-1.5-2.0.
   • Izinga lokukhula: 0.5-1μm/h.
5. Ukutsalela: Emva kokukhula, faka i-anneal kwi-250°C imizuzu engama-30.

5.2.3 Ukubeka iliso kwindawo

1. Ukubeka esweni i-RHEED: Ukujongwa kwangexesha lokwakhiwa kwakhona komphezulu kunye nendlela yokukhula.
2. I-Mass Spectrometry: Jonga amandla e-molecular beam.
3. I-Infrared Thermometer: Ulawulo oluchanekileyo lobushushu be-substrate.

5.3 Amanqaku oLawulo lweNkqubo

1. Ulawulo lobushushu: Ubushushu be-substrate buchaphazela umgangatho wekristale kunye nokwakheka komphezulu.
2. Umlinganiselo weBeam Flux: Umlinganiselo weTe/Zn uchaphazela iintlobo zeziphene kunye noxinzelelo.
3. Izinga Lokukhula: Amanani aphantsi aphucula umgangatho wekristale.

5.4 Uhlalutyo lwezinto ezilungileyo nezingalunganga

Iingenelo:

• Ukwakhiwa ngokuchanekileyo kunye nolawulo lwe-doping.
• Iifilimu ze-single-crystal ezikumgangatho ophezulu.
• Iindawo ezithe tyaba ngokweathom zinokufikelelwa.

Iingxaki:

• Izixhobo ezibizayo.
• Amanqanaba okukhula acothayo.
• Ifuna izakhono zokusebenza eziphambili.

6. Ezinye iindlela zokwenziwa

6.1 Ukususwa koMphunga weKhemikhali (i-CVD)

1. Izinto ezingaphambili: iDiethylzinc (DEZn) kunye ne-diisopropyltelluride (DIPTe).
2. Ubushushu bokusabela: 400-500°C.
3. Igesi Yokuthwala: I-nitrogen okanye i-hydrogen ecocekileyo kakhulu.
4. Uxinzelelo: Uxinzelelo olusemoyeni okanye oluphantsi (10-100Torr).

6.2 Ukufuma kobushushu

1. Izinto Ezivela Kumthombo: Umgubo we-ZnTe ococekileyo kakhulu.
2. Inqanaba leVacuum: ≤1×10⁻⁴Pa.
3. Ubushushu bokufuma: 1000-1100°C.
4. Ubushushu beSubstrate: 200-300°C.

7. Isiphelo

Kukho iindlela ezahlukeneyo zokwenza i-zinc telluride, nganye ineengenelo zayo kunye neengxaki zayo. I-Solid-state reaction ifanelekile ekulungiseleleni izinto ezininzi, ukuthuthwa komphunga kuvelisa iikristale ezikumgangatho ophezulu, iindlela zesisombululo zilungele ii-nanomaterials, kwaye i-MBE isetyenziselwa iifilimu ezincinci ezikumgangatho ophezulu. Izicelo ezisebenzayo kufuneka zikhethe indlela efanelekileyo ngokusekelwe kwiimfuno, kunye nolawulo oluqinileyo lweeparameter zenkqubo ukuze kufunyanwe izixhobo ze-ZnTe ezisebenzayo. Imiyalelo yexesha elizayo ibandakanya ukwenziwa kobushushu obuphantsi, ulawulo lwemo, kunye nokwenza ngcono inkqubo yokusetyenziswa kweziyobisi.