Near infrared photodetectors based on sub‐gap absorption in organohalide perovskite single crystals

Lin, Qianqian; Armin, Ardalan; Burn, Paul L.; Meredith, Paul

doi:10.1002/lpor.201600215

Cited by 77 publications

(63 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Under ideal conditions, the photocurrent generated by two-photon absorption showed a square ( n = 2) dependence on the input intensity [ 51 ]. However, our tested photocurrents (with 1 < n < 2) exhibited highly dependent on incident power, which was mainly attributed to the effect of trap-state’s sub-gap absorption [ 8 , 52 ]. This tendency was consistent with that reported for near-infrared CsPbBr 3 and MAPbBr 3 photodetectors [ 8 , 51 ].…”

Section: Resultsmentioning

confidence: 99%

Formamidinium Lead Bromide (FAPbBr3) Perovskite Microcrystals for Sensitive and Fast Photodetectors

et al. 2018

View full text Add to dashboard Cite

Because of the good thermal stability and superior carrier transport characteristics of formamidinium lead trihalide perovskite HC(NH2)2PbX3 (FAPbX3), it has been considered to be a better optoelectronic material than conventional CH3NH3PbX3 (MAPbX3). Herein, we fabricated a FAPbBr3 microcrystal-based photodetector that exhibited a good responsivity of 4000 A W−1 and external quantum efficiency up to 106% under one-photon excitation, corresponding to the detectivity greater than 1014 Jones. The responsivity is two orders of magnitude higher than that of previously reported formamidinium perovskite photodetectors. Furthermore, the FAPbBr3 photodetector’s responsivity to two-photon absorption with an 800-nm excitation source can reach 0.07 A W−1, which is four orders of magnitude higher than that of its MAPbBr3 counterparts. The response time of this photodetector is less than 1 ms. This study provides solid evidence that FAPbBr3 can be an excellent candidate for highly sensitive and fast photodetectors.Electronic supplementary materialThe online version of this article (10.1007/s40820-018-0196-2) contains supplementary material, which is available to authorized users.

show abstract

Section: Resultsmentioning

confidence: 99%

Formamidinium Lead Bromide (FAPbBr3) Perovskite Microcrystals for Sensitive and Fast Photodetectors

et al. 2018

View full text Add to dashboard Cite

show abstract

“…High‐performance perovskite photodetectors, including both broadband and narrowband versions, have been fabricated and shown to exhibit desirable performance . More recently, efficient X‐ray detectors, photodetector arrays, novel single‐crystal‐ and nanowire‐based OHP photodetectors have also been realized.…”

Section: Introductionmentioning

confidence: 99%

Near‐Infrared and Short‐Wavelength Infrared Photodiodes Based on Dye–Perovskite Composites

Lin

Wang

Young

et al. 2017

Adv Funct Materials

Self Cite

View full text Add to dashboard Cite

Organohalide perovskites have emerged as promising light-sensing materials because of their superior optoelectronic properties and low-cost processing methods. Recently, perovskite-based photodetectors have successfully been demonstrated as both broadband and narrowband varieties. However, the photodetection bandwidth in perovskite-based photodetectors has so far been limited to the near-infrared regime owing to the relatively wide band gap of hybrid organohalide perovskites. In particular, short-wavelength infrared photodiodes operating beyond 1 µm have not yet been realized with organohalide perovskites. In this study, narrow band gap organic dyes are combined with hybrid perovskites to form composite films as active photoresponsive layers. Tuning the dye loading allows for optimization of the spectral response characteristics and excellent charge-carrier mobilities near 11 cm 2 V −1 s −1 , suggesting that these composites combine the light-absorbing properties or IR dyes with the outstanding charge-extraction characteristics of the perovskite. This study demonstrates the first perovskite photodiodes with deep near-infrared and short-wavelength infrared response that extends as far as 1.6 µm. All devices are solution-processed and exhibit relatively high responsivity, low dark current, and fast response at room temperature, making this approach highly attractive for next-generation light-detection techniques.

show abstract

“…Artificial cerebrospinal fluid (aCSF), which mimics a similar electrophysiological condition for patch clamp studies, is used for the photocurrent measurements ( Figure a). The transient behavior of the biointerface has near infrared photoresponse due to absorption by the surface states of the perovskite microcrystals (Figure b) . The biointerface shows a linear response to the light illumination (Figure c), and a photocurrent of ≈1.0 nA can be induced at a relatively low‐intensity level of 100 µW cm −2 at 630 nm, which shows the effective photovoltaic performance of the biointerface.…”

Section: Resultsmentioning

confidence: 98%

“…In addition, compositional control varying absorption from ultravoilet (UV) to near‐infrared (near‐IR) wavelengths can lead to spectrally adjustable photoactive substrates. Due to its advantageous properties, a new generation of solution‐processable solar cells has experienced a significant improvement in power conversion efficiencies, and ultrasensitive photodetectors has been developed using this material as well . However, the stability of the perovskites in ambient conditions still remains as a major challenge, and if we think this unique material in an aqueous environment for biological applications, the stability issue becomes more serious.…”

Section: Introductionmentioning

confidence: 99%

Perovskite‐Based Optoelectronic Biointerfaces for Non‐Bias‐Assisted Photostimulation of Cells

Aria¹,

Srivastava²,

Şekerdağ³

et al. 2019

Adv Materials Inter

View full text Add to dashboard Cite

circuits, [1] curing neurological diseases, and developing neuroprosthetics. [2] These interfaces, which utilize different materials and technologies ranging from silicon microelectrodes [3] to nanostructures, [4] have been designed for the treatment of a diverse range of neural diseases such as sensory issues including hearing loss, [5] blindness, [6][7][8] spinal cord injury, [9] psychiatric diseases, [10] and motor disorders. [11] The photoactive interfaces due to their battery-less stimulation mechanism have facilitated many promising health care applications such as retina prosthetics with high-spatial resolution and remote functioning. [8,12,13] Recent studies used semiconductor nanostructures, [14] gold nanoparticles, [15] and hybrid semiconductor polymers [7,12,16] for photoactive neural interfaces. The aforementioned materials showed promising progress for neural prosthetics.In comparison with the materials used in previous studies, an organohalide perovskite has many unique optoelectronic Organohalide perovskites have attracted significant attention for efficient solar energy harvesting. They boost the photoelectrical conversion efficiency of the solution-processable solar cells because of having a nearly 100% internal quantum efficiency, operating in both narrow-and broadband spectral regimes, near-infrared sub-bandgap absorption, and high diffusion length.At the same time, these optoelectronic properties make it an ideal candidate for photostimulation of neurons. However, the biocompatibility of perovskite and its longevity in a cell medium constitute a major limitation to use it for biological interfaces. Here, high-level perovskite stability and biocompatibility are shown by forming hydrophobic perovskite microcrystals and encapsulating them within a polydimethylsiloxane layer. For effective and safe photostimulation of cells perovskite microcrystals are interfaced with poly(3hexylthiophene-2,5-diyl) (P3HT) polymer for dissociation of the photogenerated charge carriers, which leads to non-bias-assisted cell stimulation. The results point out a new direction for the use of perovskite for photomedicine.

show abstract

Near infrared photodetectors based on sub‐gap absorption in organohalide perovskite single crystals

Cited by 77 publications

References 45 publications

Formamidinium Lead Bromide (FAPbBr3) Perovskite Microcrystals for Sensitive and Fast Photodetectors

Formamidinium Lead Bromide (FAPbBr3) Perovskite Microcrystals for Sensitive and Fast Photodetectors

Near‐Infrared and Short‐Wavelength Infrared Photodiodes Based on Dye–Perovskite Composites

Perovskite‐Based Optoelectronic Biointerfaces for Non‐Bias‐Assisted Photostimulation of Cells

Contact Info

Product

Resources

About