Carrier selective MoOx/Si heterojunctions: Role of thickness

Self‐Powered and High‐Performance Alternating Current Photodetectors to enhance Broadband Photodetection

“…Additionally, the sharp drop in the transmittance spectra at 400 nm indicates MoO 3 's fundamental absorption edge, arising from the band gap, which matches well with values reported in pre-existing studies. [21,22] The transmittance and absorption spectra of the MoO 3 /glass samples after Au-NP deposition are presented in Figure 1b and Figure S2a (Supporting Information). The spectra showed a reduction in the transmittance in the visible region after the Au NPs deposition.…”

“…This enhancement reveals that the sensitivity is much higher due to AC-PV effect in comparison to conventional PV effect. Meanwhile, the rise time (τ r , which is defined as a change in the photocurrent from 10% to 90%) and fall time of the device (τ f , known as a change in the photocurrent from 90% to 10%) were calculated under self-powered conditions; [9,21] τ r and τ f values were found to be 35 and 48 ms, respectively (Figure 2f). The observed difference in rise and fall times is associated with the generation and recombination rate of the photogenerated charge carriers.…”

“…MoO 3 is an attractive and promising material for use in photodetection because of its high mobility; [ 21 ] however, MoO 3 ‐based PDs have been limited to only UV PDs because of their absorption, which poses a major challenge for wide‐range photodetection. [ 22 ] One promising way to enhance photodetection over a wide spectral range is to design a novel heterostructure of PD with enhanced charge transfer efficiency.…”

“…[14][15][16][17][18] In addition, metal-oxide-based wide-bandgap materials such as titanium dioxide (TiO 2 ), zinc oxide (ZnO), nickel oxide (NiO), and molybdenum trioxide (MoO 3 ) are only considered to design the UV PDs. [9,[19][20][21] However, despite the achievements made in the development of PDs, achieving wide-band photodetection with robust performance (including both high detectivity and rapid response) in metal-oxide-based PDs is still challenging, and urgently demands the development of an alternative approach to develop an efficient and self-biased broadband PD.MoO 3 is an attractive and promising material for use in photodetection because of its high mobility; [21] however, MoO 3 -based PDs have been limited to only UV PDs because of their absorption, which poses a major challenge for widerange photodetection. [22] One promising way to enhance photodetection over a wide spectral range is to design a novel heterostructure of PD with enhanced charge transfer efficiency.…”

“…[14][15][16][17][18] In addition, metal-oxide-based wide-bandgap materials such as titanium dioxide (TiO 2 ), zinc oxide (ZnO), nickel oxide (NiO), and molybdenum trioxide (MoO 3 ) are only considered to design the UV PDs. [9,[19][20][21] However, despite the achievements made in the development of PDs, achieving wide-band photodetection with robust performance (including both high detectivity and rapid response) in metal-oxide-based PDs is still challenging, and urgently demands the development of an alternative approach to develop an efficient and self-biased broadband PD.…”