Narrowband Monolithic Perovskite–Perovskite Tandem Photodetectors. Issue 22 (26th August 2022)

• Record Type: Journal Article
• Authors: Martínez‐Goyeneche, Lucía; Gil‐Escrig, Lidón; Susic, Isidora; Tordera, Daniel; Bolink, Henk J.; Sessolo, Michele
• Is Part Of: Advanced optical materials. Volume 10:Issue 22(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-08-26
• Subjects: narrowband photodetection -- perovskites -- photodetectors -- tandem devices -- vacuum deposition; Optical materials -- Periodicals; Photonics -- Periodicals; 620.11295
• DOI: 10.1002/adom.202201047
• Languages: English
• ISSNs: 2195-1071

Abstract

Abstract: Narrowband photodetectors (PDs) are sought after for many applications requiring selective spectral response. The most common systems combine optical bandpass filters with broadband photodiodes. This work reports a method to obtain a narrowband response in a perovskite PD by the monolithic integration of a perovskite photoconductor and a perovskite photodiode. The spectral response of the tandem PD is determined by the bandgap energy difference of the two perovskites, and exhibits a full width at half maximum below 85 nm, an external quantum efficiency up to 68% and a high specific detectivity of ≈ 10 12 Jones in reverse bias, enabling the device to detect weak light signals. The absorption profile of the narrowband PD can be tuned by changing the thickness and bandgap of the wide bandgap perovskite absorber. Abstract : Narrowband response in perovskite photodetectors is obtained using a monolithic structure consisting in a wide bandgap perovskite photoconductor in series with a narrower bandgap perovskite photodiode. The tandem devices show narrow spectral response in the near infrared with a full width at half maximum of ≈80 nm, external quantum efficiency over 58% and high specific detectivity of ≈10 12 Jones.