• Scott, Mary C.
• Jeanloz, Raymond
• Kawashima, Tetsuya
• Smart, Thomas
• Javey, Ali
• Chrzan, Daryl C.
• Madsen, Morten
• Yusa, Hitoshi
• Yalisove, Reed
• Higashitarumizu, Naoki

Abstract

<p>Black phosphorus (BP) is a narrow bandgap (∼0.3 eV) semiconductor with a great potential for optoelectronic devices in the mid-infrared wavelength. However, it has been challenging to achieve a high-quality scalable BP thin film. Here we present the successful synthesis of optically active BP films on a centimeter scale. We utilize the pulsed laser deposition of amorphous red phosphorus, another allotrope of phosphorus, followed by a high-pressure treatment at ∼8 GPa to induce a phase conversion into BP crystals. The crystalline quality was improved through thermal annealing, resulting in the observation of photoluminescence emission at mid-infrared wavelengths. We demonstrate high-pressure conversion on a centimeter scale with a continuous film with a thickness of ∼18 nm using a flat-belt-type high-pressure apparatus. This synthesis procedure presents a promising route to obtain optical-quality BP films, enabling the exploration of integrated optoelectronic device applications such as light-emitting devices and mid-infrared cameras on a chip scale.</p>

Topics

• impedance spectroscopy
• photoluminescence
• amorphous
• phase
• thin film
• semiconductor
• annealing
• pulsed laser deposition
• Phosphorus