l (1991 ACTA PHYSICA POLONICA A 5 MERCURY ZINC TELLURIDE 10.6 pm AMBIENT TEMPERATURE PHOTODETECTORS IOOWSKI IGO td O 5 -9 Wrz lnd (Received March 21' 1991) hrtl nd xprntl nvttn f rr zn tllrd (M bnt tprtr lnvlnth phtdttr r rprtd h ł- tt dttvt f M phtndtr (C phtdd phtl- trnt (EM nd br dttr t 1 p hv bn l- ltd fntn f trl ptn dpn nd tr f th dv h hh-tprtr lnvlnth C nd EM dttr hv bn fbrtd fr C-dpd bl M rtl rn b dfd nh/nnl thn h rd prfrn h bn nfrntd th thrtl prdtn hn d vrll rnt It nldd tht th hh fr f rt tblt nd hrdn f M th - trl prr n prn t rr d tllrd nd tht t ll rpl th lttr n ppltn fr hh-tprtr phtdttr h prfrn f hh-tprtr M phtdttr n b frthr - prvd b th f ptl rnnt vt nd ptl rn h dv xhbt dttvt b vrl rdr f ntd hhr thn thr- l dttr th bnnnd rpn t nd n hv prfr- n prbl t tht f l thrl dttr ACS nbr 7+ 7E 1 Intrdtn Gnrl n rdr t hv hh ntvt dttn t nr t rn r t lt thrltr ln h pll prtnt fr dv prtn n th fr I rn h prtn f lnvlnth nrr bnd p ndtr phtdttn n b fll xtndd t bnt tprtr prvdd pprprt ptztn f th dv Abnt tprtr -1 μ Cd phtndtr rprtd fOr th frt t b tr nd thr lh rr [1-] Extnv xprn- tl nd thrtl td n hh-tprtr phtndtn hv l bn (751 75 J. Piotrowski prfrd n th UK [7-] th USA [9-11] nd n Ylv [1] t b phl lttn th hh-tprtr phtdttn r b-I dttr thrfr prvnt f thr prfrn t f prr prtn A- bnt tprtr 1 μ MC phtndtn r t prnt bn ffrd b vrl nftrr [11 13] h fnd prtnt ppltn n drt nd htrdn I dttn t Mrr zn tllrd (M d t t rltv tblt nd hh fr f rt nddt t rpl Cd n ppltn fr hh-tprtr ln- vlnth phtndtn [1-19] r rprt rnt hvnt n th dn nd thnl f M hh-tprtr lnvlnth phtdttr hrtl prfrn f hh tprtr phtdttr 2.1. Performance related semiconductor parameters of MZT r lltn f th prfrn f phtndtn t nr t d- trn th flln ndtr prprt th bnd p ntrn nntr- tn brptn ffnt nd Ar rbntn t Ardn t l t l [1] th bnd p f M vn b h ntrn nntrtn lltd n th xprn prpd b óź- nd l [19] h ltrn nd lht hl fftv n b tblhd rdn t th Kn bnd dl hr P = 5 x 1 -1 nd ∆ = 1 h hv hl fftv h ltrn blt lltd hr s = (95 x 1 - /x 7. 5 r = (95 x 1 - /x h frl (5 dftn f th b t l [] xprn fr th bt ft t th xprntl dt n th 9 x < 1 rn f ptn h ltrn-thl blt rt b tn l t 1 Mrr n llrd 1θ μ Abnt prtr 753 In nrr bnd p rr-bd ndtn nd t hh tprtr th Ar 1 nd 7 pr r th dnnt rbntn hn [1-] h ntrn Ar 1 rbntn t F1 r vrlp ntrl f prd lh fntn h vl f [1] 2 = h bn d t ft r xprntl dt fr x = 1 ÷ 1 h hh-frn dltr ntnt f M pprxtd εf = 15 - x + 13x (7 h Ar 1 nd 7 rbntn t r hr z = p/n h rt f ntrn Ar 7 t Ar 1 rbntn t lltd rdn t [] Abrptn ffnt lltd thn th Kn dl tn nt - nt th M—rtn hft rdn t Andrn xprn [3] r 1 h th lltd brptn ffnt f ntrn nd p-tp M fn- tn f ptn nd tprtr A th fr h p-tp dpn nr brptn rlt f rdd bndflln fft 75 J. Piotrowski 2.2. Phooconducor parameters h hh-tprtr phtndtr n b tftrl drbd b pl dl [] n hh h phnn pt fft rf rbn- tn nd th nfln f brnd rdtn n b nltd t ndr tpl phtndtr thn fl f nrr bnd p ndtr rt- nlr n hp h rtvt f th phtdttr hr l, w, d th lnth dth nd thn f th phtndtr λ th vlnth f rdtn nd K th nt ffn h nt ffn hr r1 nd r r frnt nd bd rfltn In th pt f r1 = r2 = 1 h nl-tn prfrn r dttvt f ntrn ndtr phtdttn ltd b th n d b tttl flttn n hr rrr nrtn nd rbntn rt In hh-tprtr phtndtn thr r bll thr r f n t b ndrd th hnn-t th nrtn-rbntn G nd th 1/f n h 1/f n n b nzd b pprprt fbrtn thn - ltn th 1/f n th rltn n vlt h nrlzd dttvt Whn th nrtn-rbntn n dnt An r1 = nd r = 1 h lt xprn hv t x fr d = /α [1] In th Mrr n llrd 1θ μ Abnt prtr 755 hr = ατ(z +1/z/n ( h ntt ατ(z+1/z/n n b d nrlzd dpn-dpndnt fr f rt f ndtr hh dtrn th ltt prfrn f hh-tprtr phtndtn t vn vlnth r ntrn n- dtr bn l t ατl/n nd t ατ /n rnll ntrdd th fr f rt r h th nrlzd fr f rt f ntrn nd p- tzd p-tp M fr 1 μ phtndtr fntn f ptn Cptn rrd fr th bt prfrn nr th drn t- prtr d t th tprtr- bnd p dpndn f M h nr th p-tp dpn prd t th ntrn trl rlt f nrn th z — I/z brptn ffnt nd rbntn t nd hv t x vl t z≈3 A frthr nr f dpn rlt n dr f nl d t th rpd dr f th Ar 7 rbntn lft It hld b ntd tht th lltd nd rd vl fr ntrn trl t 3 K r hhr prd t th n lltd b Spr [9] r 3 h b prtr f nld 1 μ-ptzd phtn- dtn fntn f dpn In th lltn b pr dnt f 1 W/ 2 d th vl hvbl n n ptzd ht dptn d- n A h th nrlzd dttvt nr th b t l b hn thrl n prvl At hh b th dttvt hv th nrtn-r- bntn n lt A vr d b pr dptn rrd t hv 75 tr th x prfrn h b dfflt t rlz n prt hvr It hld b ntd tht th pt ptn dpn nd dttr thn dpnd n th b pr dnt ttvt f bt 1 x 1 8 z 1 / 2 /W n b hvd n ptzd dv (x = 113 z = 3 d = 5 μ th 1 W/2 b pr dptn hl th nrtn-rbntn n lt f prfrn Mrr n llrd 1θ μ Abnt prtr 757 is ≈2WCln8/ x z1 t 1 K nr dttvt b n rdr f ntd ( 5; th hvr pnd b n nr f th rpn t 2.3. Photoelectromagnetic detector parameters h phtltrnt fft h l bn d fr bnt tpr- tr M 1 μ phtdttn [ -3] h dffn lnth n th nrr bnd p M ll (d μ hl th brptn f 1 μ rd- tn rltvl (α ≈1/ In h th rdtn nfrl brbd thn th dffn lnth nd lr dffrn n th rf r- bntn vlt nr fr d rpn f EM dttr h vlt rpnvt nd dttvt h bn lltd n th nrlzd thr f EM fft vn b l [] n th pt f nd 1 rfltn ffnt t th frnt nd rr rf rptvl A n bn ppld t th EM dttr th thrl hnn— t n th nl n - r h th lltd dttvt fntn f trl ptn fr dttvt-ptzd dpn thn nd nt fld h x hv- bl vlt rpnvt nd dttvt f nld 1 μ dv r f bt 5 /W (fr 1 d dv nd 35 x 1 7 z1 / 2 / W rptvl nd th dttvt nr b ftr f 9 t K A 7 nd h th pt prfrn f th nld dv hvbl th p-tp trl (α = x 1 17 -3 nd th nt fld f h rpn t f dttvt-ptzd dv f bt 1 n In hh frn dn th rpn t bl 1 p n b hvd th xpn f prfrn 75 J. Piotrowski Mrr n llrd 1 μ Abnt prtr 759 2.4. Dember detectors h dffn phtvlt (br fft rlt fr dffn f ph- tnrtd rrr [31-33] ndtn r t b t fr nrtn f th phtvlt th dtrbtn f phtnrtd rrr hld b nnfr nd th dffn ffnt f ltrn nd hl t b dffrnt h rdnt - ll rlt fr nnnfr ptl nrtn nd fr dffrn n rf rbntn vlt t th frnt nd b rf f th dv h - br fft ltrl fld rtrn th ltrn th hhr blt hl hl r lrtd th n bth flx l h bt prfrn hv- bl fr thn f th dv f th rdr f th dffn lnth nd fr l rbntn vlt t th frnt nd hh t th b rf f th dv h br fft dttn n b nlzd b lvn th trnprt nd ntnt tn [31] r 9 h th lltd nrlzd dttvt f 1 μ MC br dttn fntn f ptn nd tpr- tr ttvt hh 3 x 1 8 z1//W nd 1 x 1 9 z1//W r prdtd fr ptzd 1 μ dv t 3 nd K rptvl r 1 h th dpn dpndn f th lltd nrlzd rpnvt dttvt nd rpn t fr nld 1 μ MC br dttr th dttvt-ptzd thn h bt prfrn hvd n p-tp dpd trl h lltd dttvt f -3 K br dttr hhr prd t tht f phtndtn prtd t th ndtn r l 7 J.