姓名學(xué)號院系時(shí)間地點(diǎn)陳燦貽201411132033數(shù)學(xué)科學(xué)學(xué)院2015.11物理樓306黃小君201411131918數(shù)學(xué)科學(xué)學(xué)院2015.11物理樓30實(shí)驗(yàn)題目】發(fā)光二極管的伏安特性【實(shí)驗(yàn)記錄】1．實(shí)驗(yàn)儀器儀器名稱直流穩(wěn)定電源伏特表安培表滑動變阻器電阻箱發(fā)光二極管導(dǎo)線開關(guān)型號HV1791-35BX70-7112型ZX21型2．紅色發(fā)光二極管正向伏安特性測量數(shù)據(jù)記錄表電流（mA）電壓（V）修正后電壓或電流電流（mA）電壓（V）修正后電壓或電流0.000.060.008.301.917.980.000.300.0010.221.949.900.000.400.0011.421.9511.100.040.750.0012.821.9512.490.121.100.0014.601.9714.270.181.450.0016.601.9816.270.701.750.4114.581.9614.251.801.801.5016.901.9916.572.901.852.5917.601.9917.273.841.853.5318.402.0018.074.861.864.5519.302.0018.976.701.906.3814.501.9614.173．綠色發(fā)光二極管正向伏安特性測量數(shù)據(jù)記錄表

電流（mA）電壓（V）修正后電壓或電流電流（mA）電壓（V）修正后電壓或電流0.100.600.002.402.881.920.121.020.003.102.902.620.161.150.004.002.933.510.161.330.000.802.750.340.181.500.004.602.954.110.201.700.008.003.037.490.222.080.009.803.059.290.302.210.0012.803.1012.280.402.550.0016.203.1515.670.522.690.0717.703.1617.172.002.851.5219.103.1818.574．藍(lán)色發(fā)光二極管正向伏安特性測量數(shù)據(jù)記錄表電流（mA）電壓（V）修正后電壓或電流電流（mA）電壓（V）修正后電壓或電流0.000.350.007.202.954.410.000.600.008.602.966.710.181.100.0011.003.008.110.221.600.0014.003.0310.500.302.100.0016.003.0513.490.442.580.0119.003.0515.490.322.200.0011.843.0118.491.002.800.533.302.8911.342.402.881.921.602.832.821.902.851.426.002.951.13

3.602.903.1218.403.055.515．電表內(nèi)阻測量：R- 5.0Q(30mA) R- 5.985Q(6V)A V【數(shù)據(jù)處理】在同一坐標(biāo)系中作出紅、綠、藍(lán)發(fā)光二極管的伏安特性曲線。對比紅、綠、藍(lán)三種發(fā)光二極管的伏安特性曲線，定性判斷其導(dǎo)通電壓的大小。三種發(fā)光二極管伏安特性曲線?藍(lán)色發(fā)光二極管 ?紅色發(fā)光二極管 ?綠色發(fā)光二極管燼二25.0020.0015.0010.005.000.000.D0 0.50V/邑壓(5.00)燼二25.0020.0015.0010.005.000.000.D0 0.50V/邑壓(5.00)由圖可知，紅色發(fā)光二極管的導(dǎo)通電壓最小，約為2.00V；藍(lán)色次之，約為3.12V；綠色發(fā)光二極管的導(dǎo)通電壓最大，約為3.21V?！究偨Y(jié)與討論】通過實(shí)驗(yàn)及由發(fā)光二極管伏安特性曲線易知，當(dāng)二極管正向接通時(shí)，開始時(shí)LED電流隨電壓變化幾乎不可察，發(fā)光二極管不發(fā)光，但當(dāng)電壓大于某一值時(shí)(開啟電壓后)，電流隨電壓的變化率呈線性增加而且紅色二極管增長最快?！緩?fù)習(xí)思考題】發(fā)光二極管有哪些應(yīng)用？試舉一兩例并介紹其工作原理。1，各種指示燈，原理是當(dāng)裝置通電后，經(jīng)過