English
Inqubo Yokwenziwa kwe-Zinc Telluride (ZnTe)

Izindaba

Inqubo Yokwenziwa kwe-Zinc Telluride (ZnTe)

1. Isingeniso

I-Zinc telluride (ZnTe) iyinto ebalulekile ye-semiconductor yeqembu le-II-VI enesakhiwo se-bandgap esiqondile. Ezingeni lokushisa legumbi, i-bandgap yayo icishe ibe ngu-2.26eV, futhi ithola ukusetshenziswa okubanzi kumadivayisi e-optoelectronic, amaseli elanga, ama-radiation detectors, kanye neminye imikhakha. Lesi sihloko sizonikeza isingeniso esiningiliziwe ezinqubweni ezahlukene zokwenziwa kwe-zinc telluride, kufaka phakathi ukusabela kwesimo esiqinile, ukuthuthwa komphunga, izindlela ezisekelwe kwisisombululo, i-molecular beam epitaxy, njll. Indlela ngayinye izochazwa kahle ngokwemigomo yayo, izinqubo, izinzuzo kanye nokungalungi, kanye nezinto ezibalulekile okufanele zicatshangelwe.

2. Indlela Yokusabela Esimweni Esiqinile Yokwenziwa Kwe-ZnTe

2.1 Isimiso

Indlela yokusabela kwesimo esiqinile iyindlela evamile kakhulu yokulungiselela i-zinc telluride, lapho i-zinc ehlanzekile kakhulu kanye ne-tellurium zisabela ngqo emazingeni okushisa aphezulu ukuze zakhe i-ZnTe:

I-Zn + Te → I-ZnTe

2.2 Inqubo Eningiliziwe

2.2.1 Ukulungiswa Kwezinto Ezingavuthiwe

  1. Ukukhetha Izinto: Sebenzisa ama-granule e-zinc ahlanzekile kakhulu kanye nama-tellurium bumps ahlanzekile ≥99.999% njengezinto zokuqala.
  2. Ukwelashwa Kwangaphambi Kwezinto:
    • Ukwelashwa nge-zinc: Okokuqala faka i-hydrochloric acid encibilikisiwe (5%) umzuzu owodwa ukuze ususe ama-oxide angaphezulu, hlanza ngamanzi acwengekile, ugeze nge-ethanol engamanzi, bese ugcina womile kuhhavini we-vacuum ku-60°C amahora ama-2.
    • Ukwelashwa kwe-Tellurium: Cwilisa kuqala ku-aqua regia (HNO₃:HCl=1:3) imizuzwana engama-30 ukuze ususe ama-oxide angaphezulu, hlanza ngamanzi acwengekile kuze kube yilapho engathathi hlangothi, ugeze nge-anhydrous ethanol, bese ekugcineni womisa kuhhavini we-vacuum ku-80°C amahora ama-3.
  3. Ukukala: Kala izinto zokusetshenziswa ngesilinganiso se-stoichiometric (Zn:Te=1:1). Uma ucabangela ukuwohloka okungenzeka kwe-zinc emazingeni okushisa aphezulu, kungangezwa okungaphezulu okungu-2-3%.

2.2.2 Ukuxuba Izinto

  1. Ukugaya Nokuxuba: Faka i-zinc ne-tellurium esikaliwe ku-agate mortar bese ugaya imizuzu engama-30 ebhokisini lamagilavu ​​​​eligcwele i-argon kuze kube yilapho kuxubene ngokulinganayo.
  2. Ukugaya: Faka i-powder exubile esikhumbeni bese ucindezela ibe ama-pellets anobubanzi obungu-10-20mm ngaphansi kwengcindezi engu-10-15MPa.

2.2.3 Ukulungiswa Kwesitsha Sokusabela

  1. Ukwelashwa Kweshubhu Le-Quartz: Khetha amashubhu e-quartz ahlanzekile kakhulu (ububanzi bangaphakathi bungu-20-30mm, ubukhulu bodonga bungu-2-3mm), qala ngokucwilisa ku-aqua regia amahora angama-24, ugeze kahle ngamanzi acwengekile, bese womisa kuhhavini ku-120°C.
  2. Ukuphuma: Faka ama-pellets ezinto zokusetshenziswa epayipini le-quartz, xhuma ohlelweni lwe-vacuum, bese uphuma uye ku-≤10⁻³Pa.
  3. Ukuvala: Vala ithubhu le-quartz usebenzisa ilangabi le-hydrogen-oxygen, uqinisekise ubude bokuvala obungu-≥50mm ukuze kungene umoya.

2.2.4 Ukusabela Kwezinga Lokushisa Eliphezulu

  1. Isigaba Sokuqala Sokushisa: Beka ithubhu le-quartz elivaliwe esithandweni sethubhu bese ushisa ku-400°C ngesilinganiso esingu-2-3°C/min, ubambe amahora ayi-12 ukuze uvumele ukusabela kokuqala phakathi kwe-zinc ne-tellurium.
  2. Isigaba Sesibili Sokushisa: Qhubeka nokushisa kufike ku-950-1050°C (ngaphansi kwephuzu lokuthambisa le-quartz elingu-1100°C) ku-1-2°C/min, ubambe amahora angu-24-48.
  3. Ukushukuma Kweshubhu: Ngesikhathi sesigaba sokushisa okuphezulu, tshekisa isithando somlilo ku-45° njalo emahoreni ama-2 bese ushukuma izikhathi eziningana ukuqinisekisa ukuxubana kahle kwama-reactants.
  4. Ukupholisa: Ngemva kokuqeda ukusabela, pholisa kancane kancane kuze kufike ekushiseni kwegumbi ku-0.5-1°C/min ukuvimbela ukuqhekeka kwesampula ngenxa yokucindezeleka kokushisa.

2.2.5 Ukucutshungulwa Komkhiqizo

  1. Ukususwa Komkhiqizo: Vula ithubhu le-quartz ebhokisini legilavu ​​​​bese ususa umkhiqizo wokusabela.
  2. Ukugaya: Gaya kabusha umkhiqizo ube yimpuphu ukuze ususe noma yiziphi izinto ezingakasebenzi.
  3. Ukuhlanganisa: Faka ufulawa ku-600°C ngaphansi kwesimo sezulu se-argon amahora angu-8 ukuze unciphise ukucindezeleka kwangaphakathi futhi uthuthukise ubukristalu.
  4. Ukuchazwa kwezimpawu: Yenza i-XRD, i-SEM, i-EDS, njll., ukuqinisekisa ubumsulwa besigaba kanye nokwakheka kwamakhemikhali.

2.3 Ukuthuthukisa Ipharamitha Yenqubo

  1. Ukulawulwa Kwezinga Lokushisa: Izinga lokushisa elihle kakhulu lokusabela lingu-1000±20°C. Izinga lokushisa eliphansi lingabangela ukusabela okungaphelele, kanti izinga lokushisa eliphakeme lingabangela ukuguquguquka kwe-zinc.
  2. Ukulawula Isikhathi: Isikhathi sokubamba kufanele sibe ngamahora angu-≥24 ukuqinisekisa ukusabela okuphelele.
  3. Izinga Lokupholisa: Ukupholisa kancane (0.5-1°C/min) kuveza okusanhlamvu okukhulu kwekristalu.

2.4 Ukuhlaziywa Kwezinzuzo Nokungalungile

Izinzuzo:

  • Inqubo elula, izidingo eziphansi zemishini
  • Ifanele ukukhiqizwa kweqembu
  • Ukuhlanzeka okuphezulu komkhiqizo

Okubi:

  • Izinga lokushisa eliphezulu lokusabela, ukusetshenziswa kwamandla aphezulu
  • Ukusatshalaliswa kosayizi wokusanhlamvu okungafani
  • Kungaqukatha inani elincane lezinto ezingaphenduliwe

3. Indlela Yokuthutha Umhwamuko Wokwenziwa Kwe-ZnTe

3.1 Isimiso

Indlela yokuthutha umusi isebenzisa igesi yokuthwala ukuthutha umusi ophendulayo uye endaweni yokushisa okuphansi ukuze ubekwe endaweni ethile, kufezwe ukukhula okuqondile kwe-ZnTe ngokulawula amazinga okushisa. I-Iodine ivame ukusetshenziswa njenge-ejenti yokuthutha:

I-ZnTe(ama) + I₂(g) ⇌ ZnI₂(g) + 1/2Te₂(g)

3.2 Inqubo Eningiliziwe

3.2.1 Ukulungiswa Kwezinto Ezingavuthiwe

  1. Ukukhetha Izinto: Sebenzisa i-ZnTe powder ehlanzekile kakhulu (ubumsulwa ≥99.999%) noma i-Zn ne-Te powders ezixutshwe ngendlela ye-stoichiometrically.
  2. Ukulungiswa Kwe-Ejenti Yokuthutha: Amakristalu e-iodine ahlanzekile kakhulu (ubumsulwa ≥99.99%), umthamo wevolumu yeshubhu yokusabela engu-5-10mg/cm³.
  3. Ukwelashwa Kweshubhu Le-Quartz: Kufana nendlela yokusabela kwesimo esiqinile, kodwa kudingeka amashubhu e-quartz amade (300-400mm).

3.2.2 Ukulayisha Ishubhu

  1. Ukubekwa Kwezinto: Beka i-ZnTe powder noma ingxube ye-Zn+Te ekugcineni kweshubhu ye-quartz.
  2. Ukwengezwa kwe-iodine: Faka amakristalu e-iodine epayipini le-quartz ebhokisini legilavu.
  3. Ukususwa: Phuma uye ku-≤10⁻³Pa.
  4. Ukuvala: Vala ngelangabi le-hydrogen-oxygen, ugcine ipayipi liqonde phezulu.

3.2.3 Ukusethwa kwe-Gradient Yokushisa

  1. Izinga Lokushisa Lendawo: Setha ku-850-900°C.
  2. Izinga Lokushisa Lendawo Ebandayo: Setha ku-750-800°C.
  3. Ubude Bendawo Enegredi: Cishe yi-100-150mm.

3.2.4 Inqubo Yokukhula

  1. Isigaba Sokuqala: Shisa kufike ku-500°C ku-3°C/min, linda amahora ama-2 ukuze uvumele ukusabela kokuqala phakathi kwe-iodine nezinto zokusetshenziswa.
  2. Isigaba Sesibili: Qhubeka nokushisa kuze kufike ezingeni lokushisa elibekiwe, gcina izinga lokushisa lisezingeni, bese ukhula izinsuku ezingu-7-14.
  3. Ukupholisa: Ngemva kokuqeda ukukhula, pholile kuze kufike ekushiseni kwegumbi ku-1°C/min.

3.2.5 Ukuqoqwa Kwemikhiqizo

  1. Ukuvulwa Kwepayipi: Vula ipayipi le-quartz ebhokisini legilavu.
  2. Iqoqo: Qoqa amakristalu angawodwa e-ZnTe ekugcineni okubandayo.
  3. Ukuhlanza: Hlanza nge-ultrasonic nge-ethanol engamanzi imizuzu emi-5 ukuze ususe i-iodine emuncwe ebusweni.

3.3 Amaphuzu Okulawula Inqubo

  1. Ukulawulwa Kwenani Le-Iodine: Ukuhlushwa kwe-Iodine kuthinta izinga lokuthuthwa; ububanzi obuhle bungu-5-8mg/cm³.
  2. I-Gradient Yokushisa: Gcina i-gradient ingaphakathi kwama-50-100°C.
  3. Isikhathi Sokukhula: Ngokuvamile izinsuku ezingu-7-14, kuye ngobukhulu bekristalu obufunwayo.

3.4 Ukuhlaziywa Kwezinzuzo Nokungalungile

Izinzuzo:

  • Amakristalu asezingeni eliphezulu angatholakala
  • Amasayizi amakhulu ekristalu
  • Ubumsulwa obuphezulu

Okubi:

  • Imijikelezo emide yokukhula
  • Izidingo eziphezulu zemishini
  • Isivuno esiphansi

4. Indlela Esekelwe Esixazululweni Yokwenziwa Kwezinto Ezifana Ne-ZnTe

4.1 Isimiso

Izindlela ezisekelwe kwisisombululo zilawula ukusabela kwangaphambilini esixazululweni ukuze kulungiselelwe izinhlayiya ezincane ze-ZnTe noma izintambo ezincane. Ukusabela okuvamile yilokhu:

I-Zn²⁺ + HTe⁻ + OH⁻ → I-ZnTe + H₂O

4.2 Inqubo Eningiliziwe

4.2.1 Ukulungiswa kwe-Reagent

  1. Umthombo weZinc: I-Zinc acetate (Zn(CH₃COO)₂·2H₂O), ubumsulwa ≥99.99%.
  2. Umthombo weTellurium: I-Tellurium dioxide (TeO₂), ubumsulwa ≥99.99%.
  3. I-Agent Yokunciphisa: I-Sodium borohydride (NaBH₄), ubumsulwa ≥98%.
  4. Izinyibilikisi: Amanzi angenawo ama-ion, i-ethylenediamine, i-ethanol.
  5. I-Surfactant: I-Cetyltrimethylammonium bromide (CTAB).

4.2.2 Ukulungiswa Kwe-Tellurium Precursor

  1. Ukulungiselela Isixazululo: Ncibilikisa i-0.1mmol TeO₂ emanzini acwengekile angama-20ml.
  2. Ukusabela Kokunciphisa: Engeza i-0.5mmol NaBH₄, uvuselele ngamandla kazibuthe imizuzu engama-30 ukuze ukhiqize isisombululo se-HTe⁻.
    I-TeO₂ + 3BH₄⁻ + 3H₂O → HTe⁻ + 3B(OH)₃ + 3H₂↑
  3. Isimo Esivikelayo: Gcina ukugeleza kwe-nitrogen kuyo yonke indawo ukuze kuvinjelwe ukungcoliswa.

4.2.3 Ukwenziwa kwe-ZnTe Nanoparticle

  1. Ukulungiswa kwesisombululo se-Zinc: Ncibilikisa i-0.1mmol zinc acetate ku-30ml ethylenediamine.
  2. Ukuxuba Ukusabela: Faka kancane kancane isisombululo se-HTe⁻ esixazululweni se-zinc, sabela ku-80°C amahora ayi-6.
  3. Ukushintshashintsha: Ngemva kokusabela, shintshashintshashintsha ku-10,000rpm imizuzu eyi-10 ukuze uqoqe umkhiqizo.
  4. Ukugeza: Ukugeza okunye nge-ethanol namanzi ahlanzekile kathathu.
  5. Ukomisa: Yomisa nge-vacuum ku-60°C amahora ayi-6.

4.2.4 Ukwenziwa kwe-ZnTe Nanowire

  1. Ukwengezwa Kwesifanekiso: Engeza i-0.2g CTAB esixazululweni se-zinc.
  2. Ukusabela Okushisayo: Dlulisa ikhambi elixubile ku-autoclave ene-Teflon engu-50ml, sabela ku-180°C amahora ayi-12.
  3. Ukucubungula Ngemva: Kufana nokwezinhlayiya ezincane.

4.3 Ukuthuthukisa Ipharamitha Yenqubo

  1. Ukulawulwa Kwezinga Lokushisa: 80-90°C kuma-nanoparticles, 180-200°C kuma-nanowires.
  2. Inani le-pH: Gcina phakathi kuka-9-11.
  3. Isikhathi Sokusabela: amahora angu-4-6 kuma-nanoparticles, amahora angu-12-24 kuma-nanowires.

4.4 Ukuhlaziywa Kwezinzuzo Nokungalungile

Izinzuzo:

  • Ukusabela okushisa okuphansi, ukonga amandla
  • Ukwakheka nobukhulu obulawulwayo
  • Ifanele ukukhiqizwa ngezinga elikhulu

Okubi:

  • Imikhiqizo ingaba nokungcola
  • Kudinga ukucutshungulwa ngemuva
  • Ikhwalithi ephansi yekristalu

5. I-Molecular Beam Epitaxy (MBE) Yokulungiselela Ifilimu Encane ye-ZnTe

5.1 Isimiso

I-MBE ikhulisa amafilimu amancane e-ZnTe single-crystal ngokuqondisa imisebe yama-molecule ye-Zn ne-Te ku-substrate ngaphansi kwezimo ze-vacuum eziphezulu kakhulu, ilawula ngokunembile izilinganiso ze-beam flux kanye nokushisa kwe-substrate.

5.2 Inqubo Eningiliziwe

5.2.1 Ukulungiselela Uhlelo

  1. Uhlelo Lokuhlanza: I-vacuum eyisisekelo ≤1×10⁻⁸Pa.
  2. Ukulungiswa Komthombo:
    • Umthombo we-Zinc: i-zinc engu-6N ehlanzekile kakhulu ku-BN crucible.
    • Umthombo weTellurium: I-tellurium engu-6N ehlanzekile kakhulu ku-PBN crucible.
  3. Ukulungiswa kwe-substrate:
    • I-substrate ye-GaAs(100) esetshenziswa kakhulu.
    • Ukuhlanzwa kwe-substrate: Ukuhlanzwa kwe-organic solvent → ukucwilisa nge-asidi → ukuhlanza ngamanzi angena-ion → ukomisa i-nitrogen.

5.2.2 Inqubo Yokukhula

  1. Ukukhipha igesi: Bhaka ku-200°C ihora eli-1 ukuze ususe ama-adsorbates angaphezulu.
  2. Ukususwa kwe-Oxide: Shisa kufike ku-580°C, linda imizuzu eyi-10 ukuze ususe ama-oxide angaphezulu.
  3. Ukukhula Kwesendlalelo Se-Buffer: Kupholile kuze kufike ku-300°C, khulisa isendlalelo se-buffer se-10nm ZnTe.
  4. Ukukhula Okuyinhloko:
    • Izinga lokushisa le-substrate: 280-320°C.
    • Ingcindezi elingana nomsebe we-zinc: 1 × 10⁻⁶Torr.
    • Ingcindezi elinganayo yomsebe weTellurium: 2×10⁻⁶Torr.
    • Isilinganiso se-V/III silawulwa ku-1.5-2.0.
    • Izinga lokukhula: 0.5-1μm/h.
  5. Ukufakwa kwe-Annealing: Ngemva kokukhula, faka i-annealing ku-250°C imizuzu engama-30.

5.2.3 Ukuqapha Kwangaphakathi Kwendawo

  1. Ukuqapha kwe-RHEED: Ukubuka kwangempela kokwakhiwa kabusha kwendawo kanye nemodi yokukhula.
  2. I-Mass Spectrometry: Qapha amandla okukhanya kwe-molecular beam.
  3. I-Infrared Thermometer: Ukulawula izinga lokushisa le-substrate ngendlela enembile.

5.3 Amaphuzu Okulawula Inqubo

  1. Ukulawulwa Kokushisa: Ukushisa kwe-substrate kuthinta ikhwalithi yekristalu kanye nesimo somphezulu.
  2. Isilinganiso Sokugeleza Komsebe: Isilinganiso se-Te/Zn sithonya izinhlobo zamaphutha kanye nokugxila.
  3. Izinga Lokukhula: Amanani aphansi athuthukisa ikhwalithi yekristalu.

5.4 Ukuhlaziywa Kwezinzuzo Nokungalungile

Izinzuzo:

  • Ukwakheka okunembile kanye nokulawulwa kwe-doping.
  • Amafilimu e-single-crystal asezingeni eliphezulu.
  • Izindawo ezisicaba ngokwe-athomu zingafinyeleleka.

Okubi:

  • Imishini ebiza kakhulu.
  • Amanani okukhula ahamba kancane.
  • Kudinga amakhono okusebenza athuthukile.

6. Ezinye Izindlela Zokwenza Izinto

6.1 Ukususwa Komusi Wekhemikhali (i-CVD)

  1. Izinto ezingaphambili: I-Diethylzinc (DEZn) kanye ne-diisopropyltelluride (DIPTe).
  2. Izinga Lokushisa Lokusabela: 400-500°C.
  3. Igesi Yokuthwala: I-nitrogen noma i-hydrogen ehlanzekile kakhulu.
  4. Ukucindezela: Ukucindezela komoya noma okuphansi (10-100Torr).

6.2 Ukuhwamuka Kokushisa

  1. Izinto Ezivela Kumthombo: Impuphu ye-ZnTe emsulwa kakhulu.
  2. Izinga Lokushaja I-Vacuum: ≤1×10⁻⁴Pa.
  3. Izinga Lokushisa Lokuhwamuka: 1000-1100°C.
  4. Izinga lokushisa le-substrate: 200-300°C.

7. Isiphetho

Kunezindlela ezahlukahlukene zokwenza i-zinc telluride, ngayinye inezinzuzo zayo kanye nokungalungi kwayo. Ukusabela kwe-Solid-state kufanelekile ekulungiseleleni izinto eziningi, ukuthuthwa komhwamuko kuveza amakristalu angawodwa asezingeni eliphezulu, izindlela zesisombululo zilungele ama-nanomaterials, kanti i-MBE isetshenziselwa amafilimu amancane asezingeni eliphezulu. Izicelo ezisebenzayo kufanele zikhethe indlela efanele ngokusekelwe ezidingweni, ngokulawula okuqinile kwamapharamitha enqubo ukuthola izinto ze-ZnTe ezisebenza kahle kakhulu. Iziqondiso zesikhathi esizayo zifaka phakathi ukuhlanganiswa kwezinga lokushisa eliphansi, ukulawulwa kwesimo, kanye nokwenza ngcono inqubo yokusebenzisa izidakamizwa.

Isikhathi sokuthunyelwe: Meyi-29-2025
Cindezela u-enter ukuze useshe noma u-ESC ukuze uvale