A new route for caesium lead halide perovskite deposition

Abstract

Inorganic metal halide perovskites are relevant semiconductors for optoelectronic devices. The successful deposition of thin films of CsPbBr3 and CsPbCl3 has recently been obtained by Radio-Frequency magnetron sputtering. In this work we compare the morphological, structural and optical characteristics of the two materials obtained with this deposition technique. A detailed photoluminescence (PL) spectroscopy study of the as-grown samples was conducted at the macro and micro scale in a wide temperature range (10-300 K) to fully characterize the PL on sample areas of square centimeters, to assess the origin of the inhomogeneous broadening and to quantify the PL quantum yield quenching. Our results prove that this technique allows for the realization of high quality nanometric films with controlled thickness of relevance for optoelectronic applications.

Electrical and Optical Characterization of CsPbCl3 Films around the High-Temperature Phase Transitions

“…The dynamic working pressure was 2 × 10 −6 atm and the deposition rate was between 5 and 7 × 10 −2 nms −1 . The samples were fully characterized concerning morphology, structure, and stoichiometry, as extensively described in [ 12 , 18 , 19 ].…”

Flexible CsPbCl3 inorganic perovskite thin-film detectors for real-time monitoring in protontherapy

“…Room temperature XRD spectra indicate the presence of the correct crystalline phases CsPbCl 3 (ICDD PDF-4+ 18-0366), orthorhombic and tetragonal crystalline phases [13]. SEM analyses reported in [20] evidences a film morphology characterized by a continuous network of several tens of nanometer size crystals with a random distribution of bigger crystals with typical micrometer/sub-micrometer size. I-V characteristics performed with samples of different thickness on glass substrates, from 100 nm to 1.5 μm indicate a good homogeneity of the semiconductor material independently of the deposition time [21].…”

“…Cesium lead chloride (CsPbCl 3 ) films have been grown by Radio Frequency (RF) magnetron sputtering on plastic substrates equipped with an array of Cu electrodes using a Korvus HEX (Korvus Technology Ltd.) sputter equipped with an RF source working at 13.56 MHz [18][19][20]. The precursor salts (CsCl and PbCl 2 ) are grinded in equal molar ratio in a mixer mill (Retsch model MM400) to produce the powder used to manufacture the sputtering target: a 5 cm diameter disk realized by pressing the perovskite powder by means of a pneumatic press (11.5 MPa working pressure) for 24 h at 150 °C [21].…”

“…A detailed electro-optical characterization of CsPbCl 3 thin films, deposited with the same technique on glass, has been reported elsewhere [13,20]. Room temperature transmittance spectrum provided a value of the bandgap of 3.0 eV.…”

Magnetron Sputtered CsPbCl3 Perovskite Detectors as Real-Time Dosimeters for Clinical Radiotherapy

“…Cesium lead chloride (CsPbCl 3 ) films have been deposited by Radio Frequency (RF) magnetron sputtering on plastic substrates equipped with an array of Cu electrodes [15] , [16] , [17] . The mechanochemical procedure described in [18] has been used to obtain the CsPbCl 3 powder.…”