紫外燈發光(guang)原理(li)

普通紫(zi)(zi)外線(xian)燈(deng)管(guan)與日光(guang)燈(deng)管(guan)的區別在于紫(zi)(zi)外線(xian)燈(deng)管(guan)使用(yong)的是能透過紫(zi)(zi)外線(xian)的石英(ying)玻(bo)璃，燈(deng)管(guan)內(nei)

部沒有熒光粉。與(yu)日(ri)光燈工作原(yuan)理(li)一樣，啟動時，鎮流器通過(guo)啟輝(hui)器將燈管兩端的(de)燈絲點(dian)燃

使其向燈管內釋放自由(you)電(dian)子，并(bing)在啟輝器(qi)斷(duan)開時(shi)由(you)鎮流器(qi)產(chan)生的(de)感應電(dian)壓在燈絲(si)釋放的(de)自由(you)電(dian)

子(zi)協助下將燈(deng)管內錄蒸汽擊穿，形(xing)成等離子(zi)態(tai)導電，并釋放(fang)大量紫(zi)外(wai)線，紫(zi)外(wai)線通(tong)過(guo)石英玻璃

燈(deng)管輻射到燈(deng)管外(wai)部，使周圍空(kong)間(jian)受到紫(zi)(zi)(zi)外(wai)線照射。如果紫(zi)(zi)(zi)外(wai)線燈(deng)管使用的是對(dui)紫(zi)(zi)(zi)外(wai)線有較強

的阻擋作用的普通(tong)玻(bo)璃，并且內部(bu)涂覆(fu)吸收紫外線釋放可見光的熒光粉(fen)，那就變成(cheng)普通(tong)日(ri)光燈

1.深(shen)紫外LED發光(guang)機(ji)理：pN結的(de)(de)端電(dian)壓構成一定的(de)(de)屏障，施加正向偏置電(dian)壓則屏障減少，p區域和N區域的(de)(de)大(da)部分載波相互分散。由于電(dian)子遷(qian)(qian)移率(lv)遠大(da)于空穴遷(qian)(qian)移率(lv)，大(da)量電(dian)子分散在p區域，形成少量載流子注入到p區域。這種(zhong)電(dian)子與價帶(dai)孔復合，復合得到的(de)(de)能量以光(guang)能的(de)(de)形式釋放。那就是pN接合發光(guang)的(de)(de)原理。

深紫外線led燈珠(zhu)光源硬化裝(zhuang)置。

2.深紫外led燈珠發(fa)(fa)(fa)射(she)功(gong)(gong)(gong)(gong)(gong)(gong)率(lv)(lv)(lv)(lv)(lv)(lv)(lv)(lv)：通常(chang)稱為組(zu)(zu)(zu)合(he)(he)件(jian)(jian)外部(bu)(bu)(bu)量(liang)子(zi)(zi)(zi)功(gong)(gong)(gong)(gong)(gong)(gong)率(lv)(lv)(lv)(lv)(lv)(lv)(lv)(lv)，是(shi)組(zu)(zu)(zu)合(he)(he)件(jian)(jian)內(nei)部(bu)(bu)(bu)量(liang)子(zi)(zi)(zi)功(gong)(gong)(gong)(gong)(gong)(gong)率(lv)(lv)(lv)(lv)(lv)(lv)(lv)(lv)和組(zu)(zu)(zu)合(he)(he)件(jian)(jian)取(qu)(qu)出功(gong)(gong)(gong)(gong)(gong)(gong)率(lv)(lv)(lv)(lv)(lv)(lv)(lv)(lv)的(de)(de)(de)乘(cheng)積。組(zu)(zu)(zu)件(jian)(jian)的(de)(de)(de)內(nei)部(bu)(bu)(bu)量(liang)子(zi)(zi)(zi)功(gong)(gong)(gong)(gong)(gong)(gong)率(lv)(lv)(lv)(lv)(lv)(lv)(lv)(lv)是(shi)組(zu)(zu)(zu)件(jian)(jian)本身的(de)(de)(de)電光(guang)(guang)轉換功(gong)(gong)(gong)(gong)(gong)(gong)率(lv)(lv)(lv)(lv)(lv)(lv)(lv)(lv)，主要與組(zu)(zu)(zu)件(jian)(jian)本身的(de)(de)(de)特(te)性（例如(ru)，組(zu)(zu)(zu)件(jian)(jian)數(shu)據(ju)的(de)(de)(de)帶(dai)，缺點，雜質(zhi)），組(zu)(zu)(zu)件(jian)(jian)的(de)(de)(de)晶體組(zu)(zu)(zu)成和結(jie)構有關。組(zu)(zu)(zu)合(he)(he)件(jian)(jian)的(de)(de)(de)取(qu)(qu)出功(gong)(gong)(gong)(gong)(gong)(gong)率(lv)(lv)(lv)(lv)(lv)(lv)(lv)(lv)是(shi)指組(zu)(zu)(zu)合(he)(he)件(jian)(jian)內(nei)部(bu)(bu)(bu)產(chan)生的(de)(de)(de)光(guang)(guang)子(zi)(zi)(zi)。通過組(zu)(zu)(zu)件(jian)(jian)本身的(de)(de)(de)吸收(shou)、折射(she)和反(fan)射(she)，可以在組(zu)(zu)(zu)件(jian)(jian)外部(bu)(bu)(bu)實(shi)際測量(liang)的(de)(de)(de)光(guang)(guang)子(zi)(zi)(zi)的(de)(de)(de)數(shu)量(liang)。因此，提(ti)(ti)取(qu)(qu)功(gong)(gong)(gong)(gong)(gong)(gong)率(lv)(lv)(lv)(lv)(lv)(lv)(lv)(lv)的(de)(de)(de)因素包(bao)括組(zu)(zu)(zu)件(jian)(jian)數(shu)據(ju)本身的(de)(de)(de)吸收(shou)、組(zu)(zu)(zu)件(jian)(jian)的(de)(de)(de)幾何結(jie)構、組(zu)(zu)(zu)件(jian)(jian)與封(feng)裝數(shu)據(ju)的(de)(de)(de)折射(she)差、組(zu)(zu)(zu)件(jian)(jian)結(jie)構的(de)(de)(de)散射(she)特(te)性等。組(zu)(zu)(zu)合(he)(he)件(jian)(jian)內(nei)部(bu)(bu)(bu)的(de)(de)(de)量(liang)子(zi)(zi)(zi)功(gong)(gong)(gong)(gong)(gong)(gong)率(lv)(lv)(lv)(lv)(lv)(lv)(lv)(lv)和組(zu)(zu)(zu)合(he)(he)件(jian)(jian)取(qu)(qu)出功(gong)(gong)(gong)(gong)(gong)(gong)率(lv)(lv)(lv)(lv)(lv)(lv)(lv)(lv)的(de)(de)(de)乘(cheng)積是(shi)整個組(zu)(zu)(zu)合(he)(he)件(jian)(jian)的(de)(de)(de)發(fa)(fa)(fa)光(guang)(guang)效果(guo)，即(ji)組(zu)(zu)(zu)合(he)(he)件(jian)(jian)的(de)(de)(de)外部(bu)(bu)(bu)量(liang)子(zi)(zi)(zi)功(gong)(gong)(gong)(gong)(gong)(gong)率(lv)(lv)(lv)(lv)(lv)(lv)(lv)(lv)。初(chu)始(shi)組(zu)(zu)(zu)件(jian)(jian)的(de)(de)(de)發(fa)(fa)(fa)展集(ji)中(zhong)在其內(nei)部(bu)(bu)(bu)量(liang)子(zi)(zi)(zi)功(gong)(gong)(gong)(gong)(gong)(gong)率(lv)(lv)(lv)(lv)(lv)(lv)(lv)(lv)的(de)(de)(de)提(ti)(ti)高上(shang)，主要方法是(shi)通過提(ti)(ti)高組(zu)(zu)(zu)件(jian)(jian)的(de)(de)(de)質(zhi)量(liang)和散射(she)特(te)性來獲(huo)(huo)(huo)(huo)得(de)近(jin)70%的(de)(de)(de)發(fa)(fa)(fa)光(guang)(guang)功(gong)(gong)(gong)(gong)(gong)(gong)率(lv)(lv)(lv)(lv)(lv)(lv)(lv)(lv)，從而獲(huo)(huo)(huo)(huo)得(de)接近(jin)理論內(nei)部(bu)(bu)(bu)量(liang)的(de)(de)(de)發(fa)(fa)(fa)光(guang)(guang)功(gong)(gong)(gong)(gong)(gong)(gong)率(lv)(lv)(lv)(lv)(lv)(lv)(lv)(lv)，從而獲(huo)(huo)(huo)(huo)得(de)接近(jin)理論上(shang)的(de)(de)(de)發(fa)(fa)(fa)光(guang)(guang)功(gong)(gong)(gong)(gong)(gong)(gong)率(lv)(lv)(lv)(lv)(lv)(lv)(lv)(lv)獲(huo)(huo)(huo)(huo)得(de)接近(jin)理論上(shang)的(de)(de)(de)發(fa)(fa)(fa)光(guang)(guang)功(gong)(gong)(gong)(gong)(gong)(gong)率(lv)(lv)(lv)(lv)(lv)(lv)(lv)(lv)的(de)(de)(de)發(fa)(fa)(fa)光(guang)(guang)功(gong)(gong)(gong)(gong)(gong)(gong)率(lv)(lv)(lv)(lv)(lv)(lv)(lv)(lv)。

3.深紫外led燈(deng)珠(zhu)的(de)電(dian)特性(xing)：電(dian)流(liu)控制器(qi)，負載特性(xing)類似于pN結的(de)UI曲線。正導電(dian)壓的(de)極(ji)小變(bian)化(hua)導致(zhi)正向電(dian)流(liu)的(de)極(ji)大(da)變(bian)化(hua)（指數級），反向泄漏(lou)電(dian)流(liu)小，有反破壞電(dian)壓。在實際使(shi)用中，需要選(xuan)擇。深紫外led燈(deng)珠(zhu)的(de)正向電(dian)壓隨著溫(wen)度的(de)升高而減小，并(bing)且具有負溫(wen)度系(xi)數。深紫外led燈(deng)珠(zhu)需要消耗功率(lv)，部(bu)分(fen)地(di)轉換成光(guang)能。剩余(yu)部(bu)分(fen)轉化(hua)為(wei)熱(re)能，使(shi)結溫(wen)上升。散熱(re)（功率(lv)）可以表示為(wei)。

4.深紫(zi)外led燈(deng)(deng)珠的(de)光(guang)(guang)學特性：深紫(zi)外led燈(deng)(deng)珠提供(gong)半(ban)寬的(de)單色光(guang)(guang)。由于半(ban)導體的(de)能隙(xi)隨著溫(wen)(wen)(wen)度(du)(du)的(de)升高(gao)而(er)減小，所以其(qi)發射峰(feng)值波長隨著溫(wen)(wen)(wen)度(du)(du)的(de)升高(gao)而(er)增加，即光(guang)(guang)譜紅移，溫(wen)(wen)(wen)度(du)(du)系數為+2~3A/。深紫(zi)外led燈(deng)(deng)珠的(de)發光(guang)(guang)亮(liang)度(du)(du)L和正(zheng)電流(liu)。電流(liu)增加，發光(guang)(guang)亮(liang)度(du)(du)幾乎增加。其(qi)他發光(guang)(guang)亮(liang)度(du)(du)也與(yu)環境溫(wen)(wen)(wen)度(du)(du)有關。環境溫(wen)(wen)(wen)度(du)(du)越高(gao)，復合功率(lv)越低(di)，發光(guang)(guang)強度(du)(du)越低(di)。

深紫外線(xian)led燈珠的熱(re)學特性：在小電(dian)流下發光二(er)極管的溫度上升不明顯。環(huan)境溫度高時，深紫外發光二(er)極管珠的主波長變紅，亮度降(jiang)低，發光均勻性和一致性降(jiang)低。特殊陣列和大顯示器(qi)的溫度上升對(dui)發光二(er)極管的可靠性和穩(wen)定(ding)性有(you)很(hen)大的影響。因此，散熱(re)計劃非常重要。

6.深(shen)(shen)紫(zi)外(wai)led燈(deng)(deng)珠(zhu)壽命(ming)：深(shen)(shen)紫(zi)外(wai)led燈(deng)(deng)珠(zhu)的長期動作會導致光(guang)老化(hua)，特別是在(zai)大功率深(shen)(shen)紫(zi)外(wai)led燈(deng)(deng)珠(zhu)光(guang)老化(hua)問題(ti)會越(yue)來(lai)越(yue)嚴重。在(zai)測(ce)量深(shen)(shen)紫(zi)外(wai)led燈(deng)(deng)珠(zhu)壽命(ming)時，光(guang)燈(deng)(deng)損傷(shang)不(bu)足(zu)以作為深(shen)(shen)紫(zi)外(wai)led燈(deng)(deng)珠(zhu)壽命(ming)的結束。如35%那樣，LED壽命(ming)應該由深(shen)(shen)紫(zi)外(wai)線led燈(deng)(deng)珠(zhu)的光(guang)衰減率來(lai)規定，更(geng)有意義。

7.大功率(lv)紫外線led燈(deng)珠包：主(zhu)要考慮散熱(re)和發光(guang)。在(zai)散熱(re)方面(mian)，用銅襯里(li)連(lian)接鋁襯里(li)，用錫片焊接連(lian)接結晶粒和襯里(li)，效果好，性價比高。在(zai)發光(guang)方面(mian)，使用芯片實現技(ji)術，在(zai)底面(mian)和側面(mian)添加反射(she)面(mian)反射(she)的無用光(guang)能(neng)，可(ke)以獲得(de)更多(duo)的發光(guang)。