CAJ | 학술논문

利用低温水热法生长的ZnO纳米棒（ZnO-NRs），和p型有机半导体材料聚[2-甲氧基-5-（2-乙基己氧基）-1，4-苯撑乙烯撑]（MEH-PPV）复合制备了结构为“ITO/ZnO晶种/ZnO-NRs/MEH-PPV/Al”的发光器件。测试结果发现，该器件具有非常好的二极管整流特性。对ZnO-NRs/M EH-PPV异质结施加超过17 V的反向偏压时，可同时获得两种半导体材料的发光，且ZnO近紫外光（380 nm ）发射强度远大于 M EH-PPV的红橙光强度，发光功率随着反向偏压的增加迅速增强，然而施加正向偏压时未探测到发光。该器件的发光机理不同于其他文献报道的正偏压发光，而属于反偏压发光器件，其发光机理归因于有机无机复合异质结的界面特殊性和ZnO-NRs的纳米尺寸效应，反偏压下器件实现的是载流子隧穿发光，而正偏压时载流子以表面态的无辐射复合及漏电流方式消耗。
이용저온수열법생장적ZnO납미봉（ZnO-NRs），화p형유궤반도체재료취[2-갑양기-5-（2-을기기양기）-1，4-분탱을희탱]（MEH-PPV）복합제비료결구위“ITO/ZnO정충/ZnO-NRs/MEH-PPV/Al”적발광기건。측시결과발현，해기건구유비상호적이겁관정류특성。대ZnO-NRs/M EH-PPV이질결시가초과17 V적반향편압시，가동시획득량충반도체재료적발광，차ZnO근자외광（380 nm ）발사강도원대우 M EH-PPV적홍등광강도，발광공솔수착반향편압적증가신속증강，연이시가정향편압시미탐측도발광。해기건적발광궤리불동우기타문헌보도적정편압발광，이속우반편압발광기건，기발광궤리귀인우유궤무궤복합이질결적계면특수성화ZnO-NRs적납미척촌효응，반편압하기건실현적시재류자수천발광，이정편압시재류자이표면태적무복사복합급루전류방식소모。
In the present paper ,zinc oxide nanorods (ZnO-NRs) were synthesized by the hydrothermal method at lower tempera-ture and the polymer poly[2-methoxy-5-(2-ethylhexyloxy)-1 ,4-phenylenevinylene] (MEH-PPV) were used to fabricate an elec-troluminescent device based on the structure of “ITO/ZnO-seed/ZnO-NRs/MEH-PPV/Al” .The measurement of current-voltage curve shows that it has a well rectifying characteristic .When a reverse bias exceeding 17 volts was applied to the ZnO-NRs/MEH-PPV heterojunction ,both emissions of ZnO and MEH-PPV were detected .And the intensity of near ultraviolet emission from ZnO is stronger than that of the orange-red emission belonging to MEH-PPV .It was also shown that the light power is gradually promoted with the increase in the reverse bias .Unfortunately ,although carriers were injected into the heterojunction under the positive bias ,we could not get any emissions .Its mechanism is attributed to the specificity of the organic inorganic hy-brid heterojunction and the nanometer effects of ZnO-NRs .It is concluded that tunneling electroluminescence happens in this pre-pared device under the reverse bias .