High efficiency perovskite solar cells using nitrogen-doped graphene/ZnO nanorod composite as an electron transport layer

被引：82
作者：
Chandrasekhar, P. S. [1 ,2 ]
Dubey, Ashish [2 ]
Qiao, Qiquan [2 ]
机构：
[1] Indian Inst Technol Delhi, Ctr Energy Studies, New Delhi 110016, India
[2] South Dakota State Univ, Dept Elect Engn & Comp Sci, Ctr Adv Photovolta, Brookings, SD 57007 USA
来源：
SOLAR ENERGY | 2020年 / 197卷
关键词：
Perovskite solar cells; Nitrogen-doped graphene; ZnO nanorods; Nanocomposites; ENHANCED HOLE EXTRACTION; HALIDE PEROVSKITE; LOW-TEMPERATURE; ZNO; LENGTHS; NANOCOMPOSITE; DEPOSITION; OXIDE;
D O I：
10.1016/j.solener.2019.12.062
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
We demonstrate for the first time, the photovoltaic performance of perovskite solar cells (PSCs) by employing nitrogen-doped graphene/ZnO nanorod nanocomposites (NG-ZnO NR NCs) as an electron transport layer (ETL). A series of PSCs are fabricated by varying the NG concentration from 0 to 1 wt% with an increment of 0.2 wt% in ZnO NRs having a device structure of FTO/NG-ZnO NR NCs/CH3NH3PbI3/Spiro-MeOTAD/Ag. The perovskite films grown on NG-ZnO NR NCs exhibited a uniform film with high surface coverage area with an improved crystallinity. By employing photoluminescence measurements, it was found that NG-ZnO NR NCs reduced the interfacial resistance by improving charge carrier extraction, which is in correlation with an improvement in photocurrent and fill factor in the corresponding devices. At an optimized concentration of NG (0.8 wt%) in ZnO NRs, PSCs obtained an improvement in photocurrent from 17.38 mA/cm(2) to 21.98 mA/cm(2) and the power conversion efficiency from 12.87% to 16.82%, respectively.
引用
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页码：78 / 83
页数：6
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