TY - JOUR
T1 - High efficiency perovskite solar cells using nitrogen-doped graphene/ZnO nanorod composite as an electron transport layer
AU - Chandrasekhar, P. S.
AU - Dubey, Ashish
AU - Qiao, Qiquan
N1 - Funding Information:
P. S. Chandrasekhar would like to thank Department of Science and Technology (DST), Govt. of India for providing fellowship (code no. IF120755 ) under DST INSPIRE program, and gracefully acknowledging Indo-US science and technology forum (IUSSTF) for providing an internship through Bhaskara Advanced Solar Energy Fellowship (BASE) program at South Dakota State University (SDSU), USA. We would like to thank central research facility (CRF) at IIT Delhi for their kind help in SEM analysis. This work also benefitted from the NSF MRI grant program ( 1428992 ), U.S.-Egypt Science and Technology (S&T) Joint Fund, NASA EPSCoR grant, and US-Pakistan Joint Science and Technology. Appendix A
Funding Information:
P. S. Chandrasekhar would like to thank Department of Science and Technology (DST), Govt. of India for providing fellowship (code no. IF120755) under DST INSPIRE program, and gracefully acknowledging Indo-US science and technology forum (IUSSTF) for providing an internship through Bhaskara Advanced Solar Energy Fellowship (BASE) program at South Dakota State University (SDSU), USA. We would like to thank central research facility (CRF) at IIT Delhi for their kind help in SEM analysis. This work also benefitted from the NSF MRI grant program (1428992), U.S.-Egypt Science and Technology (S&T) Joint Fund, NASA EPSCoR grant, and US-Pakistan Joint Science and Technology.
Publisher Copyright:
© 2019 International Solar Energy Society
PY - 2020/2
Y1 - 2020/2
N2 - 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/cm2 to 21.98 mA/cm2 and the power conversion efficiency from 12.87% to 16.82%, respectively.
AB - 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/cm2 to 21.98 mA/cm2 and the power conversion efficiency from 12.87% to 16.82%, respectively.
KW - Nanocomposites
KW - Nitrogen-doped graphene
KW - Perovskite solar cells
KW - ZnO nanorods
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U2 - 10.1016/j.solener.2019.12.062
DO - 10.1016/j.solener.2019.12.062
M3 - Article
AN - SCOPUS:85077600622
SN - 0038-092X
VL - 197
SP - 78
EP - 83
JO - Solar Energy
JF - Solar Energy
ER -