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[求助]
聚合物/ZnO太阳能电池
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Polymer-based solar cells consisting of ZnO nanorods and poly(1-methoxy-4-(2-ethylhexyloxy)-p-phenyl-enevinylene) (MEH-PPV) are investigated by current voltage characterization and intensity modulatedphotovoltage spectroscopy (IMVS). The high quality ZnO nanorod arrays were prepared by electrodeposition, in which the length (Ln) and the concentration of deep level defects of ZnO nanorods were controlled bydeposition time (Td). Results show that increasing Td leads to ZnO nanorods with linearly increased Ln butdifferently increased defect concentration for the MEH-PPV/ZnO solar cells, providing a peak device power conversion efficiency of 0.34% at AM 1.5 illumination (100 mW/cm2) for Td 10 min. The electron lifetimesin MEH-PPV/ZnO nanorod devices at open circuit were studied by means of IMVS for the first time, and theinfluences of Ln and defect concentration on the charge recombination kinetics and device performance were revealed. It is found that, in the MEH-PPV/ZnO devices with high quality ZnO nanorods with rather lowdefect concentration, both photocurrent and recombination rate are mainly dependent on the Ln value as a result of the exponential attenuation of incident light intensity in the device, but the open circuit voltage Voc is more sensitive to the defect concentration. The present study provides new insights into designing the nanostructures for the hybrid photovoltaic devices based on vertically aligned one-dimensional nanoarrays. |
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8814402
至尊木虫 (职业作家)
- 翻译EPI: 509
- 应助: 18 (小学生)
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- 专业: 药物学其他科学问题
2楼2011-07-11 16:11:01
3楼2011-07-11 16:33:11
8814402
至尊木虫 (职业作家)
- 翻译EPI: 509
- 应助: 18 (小学生)
- 贵宾: 0.381
- 金币: 12916.1
- 散金: 47
- 红花: 16
- 帖子: 4183
- 在线: 357.8小时
- 虫号: 1184404
- 注册: 2011-01-06
- 专业: 药物学其他科学问题
【答案】应助回帖
yanjiao12(金币+120, 翻译EPI+1): 很好，谢谢 2011-07-11 20:27:45
| Polymer-based solar cells consisting of ZnO nanorods and poly(1-methoxy-4-(2-ethylhexyloxy)-p-phenyl-enevinylene) (MEH-PPV) are investigated by current voltage characterization and intensity modulated photo voltage spectroscopy (IMVS).以伏安法和IMVS研究了由ZnO纳米棒和MEH-PPV组成的聚合物基太阳能电池。The high quality ZnO nanorod arrays were prepared by electrodeposition, in which the length (Ln) and the concentration of deep level defects of ZnO nanorods were controlled by deposition time (Td). 高质量ZnO纳米棒阵列由电沉积法制备，其中ZnO纳米棒的长度和深能级缺陷浓度通过沉积时间加以控制。Results show that increasing Td leads to ZnO nanorods with linearly increased Ln but differently increased defect concentration for the MEH-PPV/ZnO solar cells, providing a peak device power conversion efficiency of 0.34% at AM 1.5 illumination (100 mW/cm2) for Td 10 min. 结果显示，沉积时间增加导致ZnO纳米棒长度线性增加，但缺陷浓度呈不同程度的增加，当沉积时间为10min，可获得AM1.5照度下0.34%的峰装置能量变换率。The electron lifetimes in MEH-PPV/ZnO nanorod devices at open circuit were studied by means of IMVS for the first time, and the influences of Ln and defect concentration on the charge recombination kinetics and device performance were revealed. MEH-PPV/ZnO 首次以IMVS方法研究了开路情况下纳米棒装置中的电子寿命，揭示了纳米棒长度和缺陷浓度对电荷复合动力学和装置性能的影响。It is found that, in the MEH-PPV/ZnO devices with high quality ZnO nanorods with rather low defect concentration, both photocurrent and recombination rate are mainly dependent on the Ln value as a result of the exponential attenuation of incident light intensity in the device, but the open circuit voltage Voc is more sensitive to the defect concentration. 研究发现，在具有相当低缺陷浓度的高质量ZnO纳米棒的MEH-PPV/ZnO 装置中，由于入射光强度的指数衰减，光电流和复合率都主要依赖于纳米棒长度值，而开路电压则对缺陷浓度更为敏感。The present study provides new insights into designing the nanostructures for the hybrid photovoltaic devices based on vertically aligned one-dimensional nanoarrays.当前研究对设计基于垂直排列的一维纳米阵列混合动力光电装置所用纳米结构提供了新的启示。 |
4楼2011-07-11 17:59:11
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