Nongeminate Recombination Dynamics–Device Voltage Relationship in Hybrid PbS Quantum Dot/C60 Solar Cells
作者： James W. Ryan , Jose Manuel Marin-Beloqui , Josep Albero , Emilio Palomares
DOI: 10.1021/JP4059824
关键词: Carrier lifetime 、 Optoelectronics 、 Charge density 、 Quantum dot 、 Light intensity 、 Heterojunction 、 Physics 、 Solar cell 、 Charge carrier 、 Organic solar cell
摘要: Here we employ transient optoelectronic techniques to study the charge present in device and nongeminate recombination rate hybrid PbS/C60 planar heterojunction solar cells under working conditions. We find that low light intensity conditions there are very few charges cell increases linearly with voltage, suggesting most of resides at electrodes (capacitive charges). At higher applied bias, stored increase exponentially. The carrier lifetime is short (τ < 1 us sun; sun = 100 mW/cm2 sun-simulated light) when compared organic cells. By correlating density, successfully reconstruct photocurrent–voltage (J–V) curve sun, demonstrating fast losses limit efficiency these quantum dot-based devices.
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