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Journal of Materials Science

, Volume 55, Issue 10, pp 4345–4357 | Cite as

Impact of electron transport layer material on the performance of CH3NH3PbBr3 perovskite-based photodetectors

  • Jyoti Chaudhary
  • Saral K. Gupta
  • Ajay Singh Verma
  • Chandra Mohan Singh NegiEmail author
Electronic materials
  • 63 Downloads

Abstract

In the present article, the electron transport materials titanium oxide (TiO2), bathocuproine (BCP) and phenyl-C61-butyric acid methyl ester (PCBM) were synthesized and investigated for the application in methylammonium lead bromide (CH3NH3PbBr3) perovskite photodetectors. Results show that device based on TiO2 electron transport layer (ETL) shows higher photocurrent, responsivity and detectivity as compared to the devices based on BCP and PCBM ETL. However, ideality factor, charge carrier mobility, trap width and trap density were found to be comparable for the devices composed of BCP ETL and TiO2 ETL. The TiO2 ETL might help in the passivation of interface traps, form good quality intimate interfaces and offers more appropriate energy levels for effective blocking of holes and efficient extraction of electrons, resulting in the improved device performance. Through impedance spectroscopy analysis, the superior performance of the device with TiO2 ETL can be attributed to the better contact selectivity and high recombination resistance.

Notes

Acknowledgements

The work was supported by financial assistance from Department of Science & Technology, India, under CURIE program (Grant No. SR/CURIE-Phase-III/01/2015(G)) and MHRD FAST Programme (Grant No. 5-5/2014-TS.VII), Govt. of India. Author Dr. Ajay Singh Verma is thankful to UGC-DAE Consortium of Scientific Research, India, for supporting this research under the scheme of UGC-CSR (Letter No. CSR/IC/BL-88/CRS-205/909).

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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of PhysicsBanasthali VidyapithBanasthaliIndia
  2. 2.Department of ElectronicsBanasthali VidyapithBanasthaliIndia

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