钙钛矿太阳电池载流子传输-复合模型研究
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摘要
通过对所制备的钙钛矿太阳电池进行交流阻抗测试,比较钙钛矿电池载流子扩散长度、载流子寿命、内部电阻及电容等参数,得出在钙钛矿太阳电池中载流子在空穴传输层扩散的特征频率约为2μs~(-1),载流子传输过程快慢顺序依次为:载流子在空穴传输层的传输、钙钛矿薄膜中的传输。另外还得出载流子在钙钛矿薄膜中的复合阻抗是构成电池总阻抗的主要部分,其值远大于空穴传输层的阻抗,约为空穴传输层的15倍。
The perovskite solar cells were tested by AC impedance. The parameters such as carrier diffusion length,carrier lifetime,internal resistance and capacitance of perovskite batteries were compared. It was found that in perovskite solar cells,The characteristic frequency of carrier diffusion in the hole transport layer is about 2 μs~(-1). Quantitative explanation of the electron transport process is as follows:the transport of electrons in the hole transport layer and the transport in the perovskite film. On the other hand,the recombination of carriers in the perovskite film is the main aspect affecting the overall impedance of the cell,which is much larger than that of the hole transport layer,which is about 15 times of that.
The perovskite solar cells were tested by AC impedance. The parameters such as carrier diffusion length,carrier lifetime,internal resistance and capacitance of perovskite batteries were compared. It was found that in perovskite solar cells,The characteristic frequency of carrier diffusion in the hole transport layer is about 2 μs~(-1). Quantitative explanation of the electron transport process is as follows:the transport of electrons in the hole transport layer and the transport in the perovskite film. On the other hand,the recombination of carriers in the perovskite film is the main aspect affecting the overall impedance of the cell,which is much larger than that of the hole transport layer,which is about 15 times of that.
引文
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[6]张慧敏.钙钛矿太阳能电池界面电荷对电池性能的影响及钙钛矿发光电化池的研究[D].北京:北京交通大学,2016.[6] Zhang Huimin. Effect of interfacial charge of perovskitesolar cell on device performance and the study ofelectroluminescent cell in[D]. Beijing:Beijing JiaotongUniversity,2016.
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[8] Gonzalez-Pedro V,Juarez-Perez E J,Arsgad W S,etal. General working principles of CH3NH3PbX3perovskite solar cells[J]. Nano Lett,2014,14(2):888—893.
[9] Fabregat-Santiago F,Bisquert J,Garcia-Belmonte G,et al. Influence of electrolyte in transport andrecombination in dye-sensitized solar cells studied byimpedance spectroscopy[J]. Solar Energy Materials andSolar Cells,2005,87(1-4):117—131.
[10]王磊.染料敏化太阳电池的载流子传输-复合模型与等效电路解析及其性能优化[D].广州:华南理工大学,2013.[10] Wang Lei. Electron transmission of dye-sensitized solarcells-composite model and equivalent circuit analysisand performance optimization[D]. Guangzhou:SouthChina University of Technology,2013.
[2] Pascoe A R,Duffy N W,Scully A D,et al. Insights intoplanar CH3NH3PbI3perovskite solar cells usingimpedance spectroscopy[J]. The Journal of PhysicalChemistry C,2015,119(9):4444—4453.
[3]赵坤,何方,黄振,等.甲烷化学链重整制备合成气技术中的钙钛矿型载氧体制备及动力学特性[J].太阳能学报,2018,39(2):420—427.[3] Zhao Kun,He Fang,Huang Zhen,et al. Preparationand kinetic properties of perovskite type oxygen carrierprepared by the chemical reforming of methane withsyngas[J]. Journal of Solar Energy,2018,39(2):420—427.
[4]段滨,黄阳,朱俊,等. HBr添加剂获得高质量钙钛矿薄膜[J].太阳能学报,2018,39(1):124—127.[4] Duan Bin,Huang Yang,Zhu Jun,et al. HBr additivesto obtain high quality perovskite films[J]. Acta EnergiaeSolaris Sinica,2018,39(1):124—127.
[5]刘西成,王德强,田博,等. D-A型三芳胺空穴传输材料的合成及其在钙钛矿电池中的应用[J].太阳能学报,2015,36(6):1522—1527.[5] Liu Xicheng,Wang Deqiang,Tian Bo,et al. Synthesisof D-A triarylamine hole-transporting material anditsapplication in perovskite cells[J]. Acta Energiae SolarisSinica,2015,36(6):1522—1527.
[6]张慧敏.钙钛矿太阳能电池界面电荷对电池性能的影响及钙钛矿发光电化池的研究[D].北京:北京交通大学,2016.[6] Zhang Huimin. Effect of interfacial charge of perovskitesolar cell on device performance and the study ofelectroluminescent cell in[D]. Beijing:Beijing JiaotongUniversity,2016.
[7]曹楚南,张鉴清.电化学阻抗谱导论(第一版)[M].北京:科学出版社,2002.[7] Cao Chunan, Zhang Jianqing. Introduction toelectrochemical impedance spectroscopy(1st Ed.)[M].Beijing:Beijing Science Press,2002.
[8] Gonzalez-Pedro V,Juarez-Perez E J,Arsgad W S,etal. General working principles of CH3NH3PbX3perovskite solar cells[J]. Nano Lett,2014,14(2):888—893.
[9] Fabregat-Santiago F,Bisquert J,Garcia-Belmonte G,et al. Influence of electrolyte in transport andrecombination in dye-sensitized solar cells studied byimpedance spectroscopy[J]. Solar Energy Materials andSolar Cells,2005,87(1-4):117—131.
[10]王磊.染料敏化太阳电池的载流子传输-复合模型与等效电路解析及其性能优化[D].广州:华南理工大学,2013.[10] Wang Lei. Electron transmission of dye-sensitized solarcells-composite model and equivalent circuit analysisand performance optimization[D]. Guangzhou:SouthChina University of Technology,2013.