Tantalum nitride films integrated with transparent conductive oxide substrates via atomic layer deposition for photoelectrochemical water splitting

Abstract

The first example of tantalum nitride electrodes on transparent conductive oxide substrates, which enables solar water splitting, is presented.

Transparent Ta3N5 Photoanodes for Efficient Oxygen Evolution toward the Development of Tandem Cells

“…[7] To date,t here have been few reports of PEC oxygen evolution using transparent Ta 3 N 5 -based photoanodes.H ajibabaei et al recently reported at ransparent Ta 3 N 5 photoanode prepared on aT a-doped TiO 2 -coated SiO 2 (Ta-TiO 2 / SiO 2 )s ubstrate. [8] This Ta 3 N 5 /Ta-TiO 2 /SiO 2 photoanode showed excellent transparencya bove the 600 nm absorption edge wavelength of Ta 3 N 5 ,although the photocurrent density produced by this photoanode at 1.23 Vv s. RHE was 0.8 mA cm À2 . [8] Thus,t he development of high-performance transparent Ta 3 N 5 -based photoanodes for use in tandem PEC cells remains challenging.Thef abrication of transparent Ta 3 N 5 films is not at rivial task, largely due to the extreme conditions required to prepare Ta 3 N 5 .T a 3 N 5 -based photoanodes are typically processed by heating Ta precursor compounds in an NH 3 atmosphere at high temperatures (close to 1000 8 8C).…”

“…[8] This Ta 3 N 5 /Ta-TiO 2 /SiO 2 photoanode showed excellent transparencya bove the 600 nm absorption edge wavelength of Ta 3 N 5 ,although the photocurrent density produced by this photoanode at 1.23 Vv s. RHE was 0.8 mA cm À2 . [8] Thus,t he development of high-performance transparent Ta 3 N 5 -based photoanodes for use in tandem PEC cells remains challenging.Thef abrication of transparent Ta 3 N 5 films is not at rivial task, largely due to the extreme conditions required to prepare Ta 3 N 5 .T a 3 N 5 -based photoanodes are typically processed by heating Ta precursor compounds in an NH 3 atmosphere at high temperatures (close to 1000 8 8C). [5a,g, 6-9] Unfortunately,f ew visible-light-transparent, electrically conductive substrate materials can survive such conditions.Inthe present work, we employed n-type GaN-coated double-sidepolished sapphire (GaN/Al 2 O 3 )s ubstrates (that do not degrade in NH 3 at high temperatures [10] )a st he substrate.…”

Atomic Layer Deposition of Space‐Efficient SnO2 Underlayers for BiVO4 Host–Guest Architectures for Photoassisted Water Splitting

“…After first-time growth, substrates were again repeatedly drop cast with Sb:SnO 2 solution, annealed in af urnace, and etched in acetic acid one more time to make the Sb:SnO 2 nanotube arrays with thicker walls. [60] 0.622.1 BiVO 4 (Flat-T8-BV) 0.213 0.62 CuWO 4 (compact) [61] 0.121.1 a-Fe 2 O 3 (host-guest) [62] 0.091 1.5 Ta 3 N 5 (compact) [63] 0.095 0.79 a-Fe 2 O 3 (compact) [64] 0.023 0.32…”

Kohlenstoffnitridmaterialien für photochemische Zellen zur Wasserspaltung

“…Allerdings leiden herkçmmliche Oxide wie etwa TiO 2 ,WO 3 und ZnO aufgrund ihrer breiten Bandlücke unter unzureichenden Lichtsammeleigenschaften. [10] All diese Materialien zeigen vielversprechende Ergebnisse,j edoch steht ihre Erforschung noch immer am Anfang.T rotz signifikanter Fortschritte in diesem Bereich [8,[11][12][13] verbleiben einige Beschränkungen wie etwa Kosten, Stabilitäti nS äure/Base und Ladungstrennungseffizienz. Dennoch liegen die so erhaltenen Photostrçme aufgrund der starken Rekombinationsverluste im Volumen nach wie vor weit unterhalb der theoretischen Grenze.…”

“…[4][5][6][7][8] In jüngster Zeit sind auch zahlreiche andere Halbleitermaterialien fürP EC in den Fokus gerückt, darunter Oxidnitride, [9] Metallchalkogenide [9] und kohlenstoffbasierte Materialien. [10] All diese Materialien zeigen vielversprechende Ergebnisse,j edoch steht ihre Erforschung noch immer am Anfang.T rotz signifikanter Fortschritte in diesem Bereich [8,[11][12][13] verbleiben einige Beschränkungen wie etwa Kosten, Stabilitäti nS äure/Base und Ladungstrennungseffizienz.…”