TiO_2纳米片/CuS钝化层量子点敏化太阳能电池的制备和性能表征
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摘要
通过在TiO_2和量子点之间添加钝化层进行光阳极的优化,可以调节光阳极界面结构,从而增加产生的光电流,与没有钝化层的光阳极数据相比,在更宽的光谱范围内增强了光电转换效率。TiO_2纳米片具有较高的电子输运效率,主要原因是其表面积大,光散射特性增强。由于CuS钝化层很好地修饰了TiO_2纳米片表面缺陷会使其光电转换性能提高,得到在标准模拟太阳光AM 1.5G,100 mW/cm~2下,沉积CuS钝化层的电池能量转换效率达到4.71%,远高于未沉积钝化层的电池效率3.91%。
The research of quantum dot sensitized solar cells(QDSSCs)is mainly to improve their photoelectric conversion efficiency.In this paper,by adding passivation layer between TiO_2 and quantum dots to optimize the photoanode,and thus the photocurrent generated could be increased.Compared with the photoanode without passivation layer,the photoelectric conversion efficiency can be enhanced in a wider spectral range.TiO_2 nanosheets(NS)has higher electron transport efficiency,mainly due to their large surface area and enhanced light scattering characteristics.Because the CuS passivation layer modified the surface defects of the TiO_2 nanosheet,the photoelectric conversion performance is improved.The power conversion efficiency of the TiO_2 NS/CuS/QDs QDSSCs is4.71% under the standard simulated AM 1.5 G,100 mW/cm~2,which is higher than that of the QDSSCs without passivation layer 3.91%.
The research of quantum dot sensitized solar cells(QDSSCs)is mainly to improve their photoelectric conversion efficiency.In this paper,by adding passivation layer between TiO_2 and quantum dots to optimize the photoanode,and thus the photocurrent generated could be increased.Compared with the photoanode without passivation layer,the photoelectric conversion efficiency can be enhanced in a wider spectral range.TiO_2 nanosheets(NS)has higher electron transport efficiency,mainly due to their large surface area and enhanced light scattering characteristics.Because the CuS passivation layer modified the surface defects of the TiO_2 nanosheet,the photoelectric conversion performance is improved.The power conversion efficiency of the TiO_2 NS/CuS/QDs QDSSCs is4.71% under the standard simulated AM 1.5 G,100 mW/cm~2,which is higher than that of the QDSSCs without passivation layer 3.91%.
引文
[1]段良升,高其乾,王鹏,等.不同厚度多孔TiO2光阳极对量子点敏化太阳能电池性能的影响[J].长春工业大学学报,2016,37(5):437-441.
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[10]H Zhang,K Cheng,Y Hou,et al.Efficient CdSe quantum dot-sensitized solar cells prepared by postsynthesis assembly approach[J].Chem.Commun.,2012,48:11235-11237.
[11]J Du,Z Du,J S Hu,et al.Zn-Cu-In-Se quantum dot solar cells with a certified power conversion efficiency of 11.6%[J].J.Am.Chem.Soc.,2016,138:4201-4209.
[12]A Manjceevan,J Bandara.Systematic stacking of PbS/CdS/CdSe multi-layered quantum dots for the enhancement of solar cell efficiency by harvesting wide solar spectrum[J].Electrochim.Acta,2018,271:567-575.
[13]S A Pawar,D S Patil,H R Jung,et al.Quantum dot sensitized solar cell based on TiO2/CdS/CdSe/ZnS heterostructure[J].Electrochim.Acta,2016,203:74-83.
[14]S Kim,A R Marshall,D M Kroupa,et al.Airstable and efficient PbSe quantum-dot solar cells based upon ZnSe to PbSe cation-exchanged quantum dots[J].ACS Nano,2015,9:8157-8164.
[2]高其乾,段良升,王鹏,等.不同形貌TiO2纳米棒对量子点敏化太阳能电池效率的影响[J].长春工业大学学报,2016,37(3):298-301.
[3]P V Kamat.Quantum dot solar cells semiconductor nanocrystals as light harvesters[J].J.Phys.Chem.C.,2008,112:18737.
[4]L Quan,W Li,L Zhu.Fabrication of Cu1.8S/CuSnanoplates CE via alternating current etching for quantum dots-sensitized solar cells[J].RSC Advances,2014,4:32214-32220.
[5]H Chen,L Zhu,H Liu.ITO porous film-supported metal sulfide CEs for high-performance quantum-dot-sensitized solar cells[J].The Journal of Physical Chemistry C,2013,117:3739-3746.
[6]P N Kumar,M Deepa,P Ghosal.Low cost copper nanostructures impart high efficiencies to quantum dot solar cells[J].ACS Applied Materials&Interfaces,2015,7:13303-13313.
[7]H Geng,L Zhu,W Li.FeS/nickel foam as stable and efficient CE material for quantum dot sensitized solar cells[J].Journal of Power Sources,2015,281:204-210.
[8]X Xin,B Li,J Jung,et al.Ab initio simulation of charge transfer at the semiconductor quantum dot/TiO2interface in quantum dot-sensitized solar cells[J].Part.Part.Syst.Char.,2015,32:80-90.
[9]S Jiao,J Du,Z Du,et al.Nitrogen-doped mesoporous carbons as counter electrodes in quantum dot sensitized solar cells with a conversion efficiency exceeding 12%[J].J.Phys.Chem.Lett.,2017,8:559-564.
[10]H Zhang,K Cheng,Y Hou,et al.Efficient CdSe quantum dot-sensitized solar cells prepared by postsynthesis assembly approach[J].Chem.Commun.,2012,48:11235-11237.
[11]J Du,Z Du,J S Hu,et al.Zn-Cu-In-Se quantum dot solar cells with a certified power conversion efficiency of 11.6%[J].J.Am.Chem.Soc.,2016,138:4201-4209.
[12]A Manjceevan,J Bandara.Systematic stacking of PbS/CdS/CdSe multi-layered quantum dots for the enhancement of solar cell efficiency by harvesting wide solar spectrum[J].Electrochim.Acta,2018,271:567-575.
[13]S A Pawar,D S Patil,H R Jung,et al.Quantum dot sensitized solar cell based on TiO2/CdS/CdSe/ZnS heterostructure[J].Electrochim.Acta,2016,203:74-83.
[14]S Kim,A R Marshall,D M Kroupa,et al.Airstable and efficient PbSe quantum-dot solar cells based upon ZnSe to PbSe cation-exchanged quantum dots[J].ACS Nano,2015,9:8157-8164.