The effect of built-in field on the surface photovoltage(SPV) response of ZnO nanoparticles was investigated by means of surface photovoltage spectroscopy(SPS). From the results of in situ SPS in atmosphere and in vac...The effect of built-in field on the surface photovoltage(SPV) response of ZnO nanoparticles was investigated by means of surface photovoltage spectroscopy(SPS). From the results of in situ SPS in atmosphere and in vacuum, we suggest that the built-in field should be a main condition for producing SPV response. By comparison of SPS with PL in vacuum as well as in atmosphere, we deduce that by changing the ambience of ZnO, its functional properties can be modulated.展开更多
Surface photovoltage spectrum(SPS), field-induced surface photovoltage spectrum(FISPS) and gas probe techniques are used together to study surface photovoltage(SPV) property of ZnO nanoparticles. The SPS of ZnO nanopa...Surface photovoltage spectrum(SPS), field-induced surface photovoltage spectrum(FISPS) and gas probe techniques are used together to study surface photovoltage(SPV) property of ZnO nanoparticles. The SPS of ZnO nanoparticles consists of two parts, band-to-band transition(P1,P2) and surface states transition(P3). The result shows that the SPV response is mostly attributed to the built-in field formed by active adsorbates, most of which is O 2. Competitive adsorption of O 2 and H 2O exists on ZnO surface. They play different roles in the influence on SPS. The Adsorption of O 2 weakens P3, whereas H 2O enhances P3. And the velocity of adsorption and desorption of O 2 on the surface is significantly faster than H 2O. The adsorption and desorption of H 2O may be correlated with the adjustment of surface structure.展开更多
有机光伏器件具有价廉、轻便、柔韧良好以及Roll to Roll制备等特点被受广泛关注与研究。基于有机材料制备的太阳能电池、晶体管、传感器等各个热门领域发挥着重要作用。本文针对有机材料的太阳能电池结构进行改进;合成的纳米粒子(Zn O...有机光伏器件具有价廉、轻便、柔韧良好以及Roll to Roll制备等特点被受广泛关注与研究。基于有机材料制备的太阳能电池、晶体管、传感器等各个热门领域发挥着重要作用。本文针对有机材料的太阳能电池结构进行改进;合成的纳米粒子(Zn O)材料,并引入纳米粒子作为太阳能电池的电子传输层材料,并对器件性能及微观结构进行表征。结果表明,增加纳米粒子作为阴极传输层(空穴阻挡层),其对活性层表面进行了有效的修饰,并改变了空间电荷区光子数,从而改善了太阳能电池的性能。展开更多
文摘The effect of built-in field on the surface photovoltage(SPV) response of ZnO nanoparticles was investigated by means of surface photovoltage spectroscopy(SPS). From the results of in situ SPS in atmosphere and in vacuum, we suggest that the built-in field should be a main condition for producing SPV response. By comparison of SPS with PL in vacuum as well as in atmosphere, we deduce that by changing the ambience of ZnO, its functional properties can be modulated.
文摘Surface photovoltage spectrum(SPS), field-induced surface photovoltage spectrum(FISPS) and gas probe techniques are used together to study surface photovoltage(SPV) property of ZnO nanoparticles. The SPS of ZnO nanoparticles consists of two parts, band-to-band transition(P1,P2) and surface states transition(P3). The result shows that the SPV response is mostly attributed to the built-in field formed by active adsorbates, most of which is O 2. Competitive adsorption of O 2 and H 2O exists on ZnO surface. They play different roles in the influence on SPS. The Adsorption of O 2 weakens P3, whereas H 2O enhances P3. And the velocity of adsorption and desorption of O 2 on the surface is significantly faster than H 2O. The adsorption and desorption of H 2O may be correlated with the adjustment of surface structure.
文摘有机光伏器件具有价廉、轻便、柔韧良好以及Roll to Roll制备等特点被受广泛关注与研究。基于有机材料制备的太阳能电池、晶体管、传感器等各个热门领域发挥着重要作用。本文针对有机材料的太阳能电池结构进行改进;合成的纳米粒子(Zn O)材料,并引入纳米粒子作为太阳能电池的电子传输层材料,并对器件性能及微观结构进行表征。结果表明,增加纳米粒子作为阴极传输层(空穴阻挡层),其对活性层表面进行了有效的修饰,并改变了空间电荷区光子数,从而改善了太阳能电池的性能。
