TY - JOUR
T1 - Fabrication of bifacial sandwiched heterojunction photoconductor – Type and MAI passivated photodiode – Type perovskite photodetectors
AU - Popoola, Abdul Jelili
AU - Gondal, Mohammed A.
AU - Popoola, Idris K.
AU - Oloore, Luqman E.
AU - Bakr, Osman
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: The authors acknowledge the funding support provided by the King Abdullah City for Atomic and Renewable Energy (K.A.CARE) through project KACARE182-GSGP-11 and KACARE182-RFP-02. The authors are thankful to King Fahd University of Petroleum & Minerals (KFUPM), Dhahran, Saudi Arabia to support this work under Project #RG181002.
PY - 2020/4/7
Y1 - 2020/4/7
N2 - In this work, we report novel heterojunctions perovskite photodetector architecture utilizing metal-free contact electrodes. The metal-free contact electrodes were exploited to fabricate photoconductor – type perovskite photodetector. The attempt to investigate the effect of passivating the active layers of the as – proposed architecture with electrolytic MAI gave rise to a photodiode – type perovskite photodetector. These two photodetector types are sensitive and responsive to light sources through their dual transparent electrodes faces (N-face and T-face). We also showed that passivating the surfaces of the sandwiched perovskite layers with MAI solution improves the performance of the fabricated photodetectors, where the detectivity is enhanced by a factor of hundred compared to non-passivated devices. The proposed photodetectors architectures demonstrate champion dual-detectivity (1.77 × 1014 Jones for N-face and 4.64 × 1014 Jones for T-face), dual-responsivity (1.94 × 103 A/W for N-face and 1.61 × 103 A/W for T-face) and high dual – sensitivity (3.3 × 102 for N-face and 1.1 × 102 for T-face). All these properties were obtained from the two faces of the MAI passivated photodetectors under 0.02 mW/cm2 red LED illumination and at −2.0 bias voltage. This novel architecture may scale up towards building energy and cost efficient classes of optoelectronic and photovoltaic devices which are responsive to light in two directions.
AB - In this work, we report novel heterojunctions perovskite photodetector architecture utilizing metal-free contact electrodes. The metal-free contact electrodes were exploited to fabricate photoconductor – type perovskite photodetector. The attempt to investigate the effect of passivating the active layers of the as – proposed architecture with electrolytic MAI gave rise to a photodiode – type perovskite photodetector. These two photodetector types are sensitive and responsive to light sources through their dual transparent electrodes faces (N-face and T-face). We also showed that passivating the surfaces of the sandwiched perovskite layers with MAI solution improves the performance of the fabricated photodetectors, where the detectivity is enhanced by a factor of hundred compared to non-passivated devices. The proposed photodetectors architectures demonstrate champion dual-detectivity (1.77 × 1014 Jones for N-face and 4.64 × 1014 Jones for T-face), dual-responsivity (1.94 × 103 A/W for N-face and 1.61 × 103 A/W for T-face) and high dual – sensitivity (3.3 × 102 for N-face and 1.1 × 102 for T-face). All these properties were obtained from the two faces of the MAI passivated photodetectors under 0.02 mW/cm2 red LED illumination and at −2.0 bias voltage. This novel architecture may scale up towards building energy and cost efficient classes of optoelectronic and photovoltaic devices which are responsive to light in two directions.
UR - http://hdl.handle.net/10754/662738
UR - https://linkinghub.elsevier.com/retrieve/pii/S1566119920301166
UR - http://www.scopus.com/inward/record.url?scp=85083880571&partnerID=8YFLogxK
U2 - 10.1016/j.orgel.2020.105730
DO - 10.1016/j.orgel.2020.105730
M3 - Article
SN - 1566-1199
VL - 84
SP - 105730
JO - Organic Electronics: physics, materials, applications
JF - Organic Electronics: physics, materials, applications
ER -