Organic Amine-Bridged Quasi-2D Perovskite/PbS Colloidal Quantum Dots Composites for High-Gain Near-Infrared Photodetectors

Pan, Wanting; Tan, Mingrui; He, Yuhong; Wei, Haotong; Yang, Bai

doi:10.1021/acs.nanolett.1c04569

Cited by 25 publications

(23 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Most recently, Pan and collaborators reported a NIR‐II photodetector based on organic amine‐bridged perovskite/PbS NCs composites. [ 131 ] The organic amine phenylethylammonium (PEA) played the role of both a surface ligand of PbS NCs and a large organic cation that anchored into perovskite lattice to form quasi‐2D perovskite (Figure 12c). The intermolecular interaction between PbS NCs and perovskite could be further enhanced by replacing one H atom of PEA with F atom to form FPEA.…”

Section: Ligands Engineering For Optoelectronic Applications Based On...mentioning

confidence: 99%

See 1 more Smart Citation

Ligands in Lead Halide Perovskite Nanocrystals: From Synthesis to Optoelectronic Applications

Sun

Yun

Liu

et al. 2022

Small

View full text Add to dashboard Cite

For example, the PbS NCs are used as light-absorbing materials in photodetectors and solar cells due to the strong optical absorption in nearinfrared regions. [7] The CdSe-based NCs have been heavily investigated in LEDs aiming to realize full-color display because of their narrow photoluminescence (PL) line widths and the wide tunable spectral range. [8] Due to the high surface-area-tovolume ratio, molecules or ions ligands that bind to the under-coordinated sites on NCs surface to keep the colloidal stability are imperative. [9] The ligands usually have two heads connected by alkyl chain. One of the heads is polar group (e.g., carboxy group, ammonium group) that coordinates with the NCs surface atoms. Another head is nonpolar group (e.g., alkyl group) that stretches into solution. The ligands not only offer colloidal stability but also play critical roles through all lifetimes of NCs. Before reaction, ligands coordinate with reagent to form soluble precursors in the solution. During reaction, the ligands can regulate crystallization kinetics through affecting supplying rate of the precursors and the formation of monomers thus affecting the size and shape of NCs. Beyond these, ligands can also terminate the growth of NCs and prevent undesired ripening. Even after synthesis, the surface defects of NCs can be eliminated through post-treatment by ligands.Ligands are indispensable for perovskite nanocrystals (NCs) throughout the whole lifetime, as they not only play key roles in the controllable synthesis of NCs with different sizes and shapes, but also act as capping shell that affects optical properties and electrical coupling of NCs. Establishing a systematic understanding of the relationship between ligands and perovskite NCs is significant to enable many potential applications of NCs. This review mainly focuses on the influence of ligands on perovskite NCs. First of all, the ligandsdominated size and shape control of NCs is discussed. Whereafter, the surface defects of NCs and the bonding between ligands and perovskite NCs are classified, and corresponding post-treatment of surface defects via ligands is also summarized. Furthermore, advances in engineering the ligands towards the high performance of optoelectronic devices based on perovskite NCs, including photodetector, solar cell, light emitting diode (LED), and laser, and finally to potential challenges are also discussed.

show abstract

Section: Ligands Engineering For Optoelectronic Applications Based On...mentioning

confidence: 99%

mentioning

confidence: 99%

Ligands in Lead Halide Perovskite Nanocrystals: From Synthesis to Optoelectronic Applications

Sun

Yun

Liu

et al. 2022

Small

View full text Add to dashboard Cite

show abstract

“…In 2022, Wei and co‐workers used quasi‐2D organohalide perovskite (PEA) 2 MA 2 Pb 3 I 10 (PEA = C 6 H 5 (CH 2 ) 2 NH 3+ , MA = CH 3 NH 3+ ) mixed PbS QDs to form a high‐gain photodetector. [ 160 ] By using different surface ligands to vary the corresponding energy levels, the device achieves a minimum detectable light intensity of 0.67 pW cm −2 . Then, trap‐induced charge injection enables the device to have a D * as high as 1.3 × 10 13 Jones at 800 nm, a large EQE of 1260% at 1200 nm, and a linear dynamic range of 200 dB.…”

Section: The Development Of Pbs(e) Qd‐based Photodetectors and Device...mentioning

confidence: 99%

Short‐Wave Infrared Photodetectors and Imaging Sensors Based on Lead Chalcogenide Colloidal Quantum Dots

Cai

et al. 2022

Advanced Optical Materials

View full text Add to dashboard Cite

Lead chalcogenide quantum dots (QDs) are one of the next generations of ideal narrow bandgap infrared semiconductors, due to their succinct solution processing, low‐cost fabrication, size‐tunable infrared bandgap, and excellent optoelectronic properties. Tremendous efforts including synthesis methods, surface ligand engineering, and device architecture engineering, drastically contribute to the significant improvement of the performance of the photodetectors based on QDs. In recent years, with the rapid development of consumer electronics, short‐wave infrared (SWIR) imaging sensors are in urgent demand. Thanks to the flexible manipulation of the QD thin film deposition process, a variety of QD‐based imaging technologies have been studied, including single‐pixel imaging sensors, integrated imaging sensors with readout circuit, and upconversion imaging sensors, which can effectively reduce the cost of SWIR imaging sensors and promote the commercial application in the consumer electronics. Herein, recent advances of QD‐based photodetectors and imaging sensors are summarized, emphatically focusing on the synthesis of QDs, surface ligand engineering, device architecture engineering, and imaging technology.

show abstract

“…The value of EQE was increased along with the reverse bias. [ 56–58 ] Highest EQE of 3.18 × 10 4 % was achieved at −2 V bias, corresponding to a gain of 318, demonstrating excellent electron injection capability. According to Equations 2, 3, and 4, we calculated the D* and responsivity of the detector under the optimal signal/noise ratio condition (Irradiance under 27 pW cm −2 at −0.5 V).…”

Section: Introductionmentioning

confidence: 99%

Low‐Temperature Crystallized and Flexible 1D/3D Perovskite Heterostructure with Robust Flexibility and High EQE‐Bandwidth Product

Feng

et al. 2023

Adv Funct Materials

Self Cite

View full text Add to dashboard Cite

All-inorganic perovskite cesium lead triiodide (CsPbI 3 ) has attracted much attention among the perovskite family due to its excellent optoelectronic properties and chemical stability. However, the high-temperature crystallization process makes CsPbI 3 less compatible with commercially flexible substrates, limiting its application into flexible optoelectronics. Here, a cation of 1-(3-aminopropyl)-2pyrrolidinone (APP) is reported that can form 1D (APP)PbI 3 perovskite as templates, and significantly reduce the CsPbI 3 black-phase transition energy with a low annealing temperature of 75 °C, which further enables a flexible (APP)PbI 3 /γ-CsPbI 3 (1D/3D) heterostructure photodetector on ITO/ PET substrate. A high external quantum efficiency (EQE) greater than 2377% is observed along the orientated 1D/3D heterostructure. The high gain and low noise result in a high specific detectivity (D*) over 10 12 Jones under −0.6 V low bias. The optimized device structure brings a high EQE × bandwidth product of 119 kHz under a low driving bias. Due to the high toughness of orientated APP + ions and the face-connected [PbI 3 ] − chains structure as a strong energy absorber, the flexible photodetector also shows excellent phase stability and impressive flexibility, remaining >90% initial responsivity after over 20 000 times bending with potential flexible imaging application in harsh environments.

show abstract

Organic Amine-Bridged Quasi-2D Perovskite/PbS Colloidal Quantum Dots Composites for High-Gain Near-Infrared Photodetectors

Cited by 25 publications

References 35 publications

Ligands in Lead Halide Perovskite Nanocrystals: From Synthesis to Optoelectronic Applications

Ligands in Lead Halide Perovskite Nanocrystals: From Synthesis to Optoelectronic Applications

Short‐Wave Infrared Photodetectors and Imaging Sensors Based on Lead Chalcogenide Colloidal Quantum Dots

Low‐Temperature Crystallized and Flexible 1D/3D Perovskite Heterostructure with Robust Flexibility and High EQE‐Bandwidth Product

Contact Info

Product

Resources

About