Gd<sup>3+</sup>-Doped α-CsPbI<sub>3</sub> Nanocrystals with Better Phase Stability and Optical Properties

Guvenc, C. Meric; Yalcinkaya, Yenal; Ozen, Sercan; Şahin, Hasan; Demir, Mustafa M.

doi:10.1021/acs.jpcc.9b05969

Cited by 61 publications

(61 citation statements)

References 54 publications

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“…Similarly, rare-earth ions are expected to be another potential dopant. 53 By partial replacement of Pb 2+ with Gd 3+ , the Gd-doped NCs exhibited prolonged phase stability of up to 11 days under ambient condition, in contrast to 5 days for undoped NCs, as evidenced by XRD. This may again be attributed to the increased tolerance factor of the perovskite structure, and the decreased defect density in NCs.…”

Section: Pre-treatmentmentioning

confidence: 97%

CsPbI₃ nanocrystal films: towards higher stability and efficiency

2020

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Section: Pre-treatmentmentioning

confidence: 97%

CsPbI₃ nanocrystal films: towards higher stability and efficiency

2020

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“…[ 127 ] Other successful alloys using B‐site ions in I‐rich PNCs have been reported such as Zn 2+ , Sr 2+ , and Gd 3+ , which require further research into their electronic properties and device performance. [ 134–136 ]…”

Section: Challengesmentioning

confidence: 99%

Metal Halide Perovskite Nanocrystal Solar Cells: Progress and Challenges

et al. 2020

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ultrasonication methods, [22] solvothermal approaches, [23] microwave-assisted synthesis, [24] and mechanical grinding. [25] PNCs not only inherit perovskite properties, but also possess the features of nanomaterials, such as their size-confinement effect and ease of processing as a colloidal ink, making PNCs suitable for incorporation into various electronic devices and compatible with printing techniques. [19,26] Moreover, nanoscale perovskites exhibit superior phase stability, particularly for CsPbI 3 and FAPbI 3 , due to their lattice construction and large surface energy. [27,28] Compared with traditional II-VI and III-V semiconductor nanocrystals, PNCs also exhibit unique properties. [29-32] Firstly, facile synthesis with inexpensive precursors can be conducted at room temperature with PNCs without inert gas protection. PNCs also have a bandgap ranging from the ultraviolet to nearinfrared, through which they can be easily tuned by size management and composition adjustment. Furthermore, they exhibit narrow bandwidth emission (<100 meV) over the entire visible range. PNCs also exhibit a fluorescence quantum yield near unity without additional passivation due to the defect-tolerance effect. Finally, they also demonstrate negligible self-absorption and Förster resonance energy transfer. These remarkable characteristics make PNCs more favorable than their bulk counterparts and traditional semiconductor nanocrystals. Thus, PNCs have promising applications in light-emitting diodes (LEDs), [33] lasers, [34] photodetectors, [35,36] and solar cells. [28] In 2016, Luther et al. first used CsPbI 3 PNCs to fabricate solar cells using a layer-by-layer approach. [28] The solar cell exhibited an extremely high open-circuit voltage (V OC) of 1.23 V, which was ≈85% of the Shockley-Queisser (S-Q) limited V OC , and a high power conversion efficiency (PCE) of 10.77%. This value was comparable to those of state-of-the-art PbS nanocrystal solar cells, [37] indicating the potential of PNC solar cells. To date, the highest PCE achieved by PNC solar cells has reached 17.39%. [38] Though PCEs have shown rapid, significant improvements, they are still limited compared to solar cells fabricated by bulk perovskite materials. Moreover, most studies on PNC solar cells have only been reported over the past two years. Research on PNC solar cells is still in its infancy, leaving substantial room for further improvement. Herein, we review the progress in the field of PNC solar cells. This review starts with detailing the unique advantages of PNCs. Next, we analyze current factors limiting their performance and Perovskite nanocrystal (PNC) solar cells have attracted increasing interest in recent years because of their excellent optoelectronic properties and unique advantages, which distinguish them from conventional nanocrystals and their bulk counterparts. This emerging type of photovoltaic is promising but faces many challenges regarding commercialization. Therefore, a comprehensive review is presented on the recent progress and current ch...

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“…On the other hand, heterovalent elements B-site doping (e.g., Bi 3+ , Eu 3+ , and Gd 3+ ) is another significant scheme to prepare red perovskites for PeLEDs possessing enhanced optoelectronic performance [ 280 ]. For example, Demir et al discovered that Gd 3+ doping could result in enhanced PLQY, increased PL lifetime, and improved α-phase stability of CsPbI 3 because of the distorted cubic symmetry, reduced defect density, and increased Goldschmidt’s tolerance factor [ 281 ]. In addition, both the isovalent and the heterovalent B-site doping strategies have been extensively applied to green and blue perovskites.…”

Section: Strategies To Achieve High-performance Impurity-doped Nanmentioning

confidence: 99%

Emergence of Impurity-Doped Nanocrystal Light-Emitting Diodes

Luo

Wang

Qiu³

et al. 2020

Nanomaterials

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In recent years, impurity-doped nanocrystal light-emitting diodes (LEDs) have aroused both academic and industrial interest since they are highly promising to satisfy the increasing demand of display, lighting, and signaling technologies. Compared with undoped counterparts, impurity-doped nanocrystal LEDs have been demonstrated to possess many extraordinary characteristics including enhanced efficiency, increased luminance, reduced voltage, and prolonged stability. In this review, recent state-of-the-art concepts to achieve high-performance impurity-doped nanocrystal LEDs are summarized. Firstly, the fundamental concepts of impurity-doped nanocrystal LEDs are presented. Then, the strategies to enhance the performance of impurity-doped nanocrystal LEDs via both material design and device engineering are introduced. In particular, the emergence of three types of impurity-doped nanocrystal LEDs is comprehensively highlighted, namely impurity-doped colloidal quantum dot LEDs, impurity-doped perovskite LEDs, and impurity-doped colloidal quantum well LEDs. At last, the challenges and the opportunities to further improve the performance of impurity-doped nanocrystal LEDs are described.

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Gd³⁺-Doped α-CsPbI₃ Nanocrystals with Better Phase Stability and Optical Properties

Cited by 61 publications

References 54 publications

CsPbI₃ nanocrystal films: towards higher stability and efficiency

CsPbI₃ nanocrystal films: towards higher stability and efficiency

Metal Halide Perovskite Nanocrystal Solar Cells: Progress and Challenges

Emergence of Impurity-Doped Nanocrystal Light-Emitting Diodes

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Gd3+-Doped α-CsPbI3 Nanocrystals with Better Phase Stability and Optical Properties

Cited by 61 publications

References 54 publications

CsPbI3 nanocrystal films: towards higher stability and efficiency

CsPbI3 nanocrystal films: towards higher stability and efficiency

Metal Halide Perovskite Nanocrystal Solar Cells: Progress and Challenges

Emergence of Impurity-Doped Nanocrystal Light-Emitting Diodes

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Gd³⁺-Doped α-CsPbI₃ Nanocrystals with Better Phase Stability and Optical Properties

CsPbI₃ nanocrystal films: towards higher stability and efficiency

CsPbI₃ nanocrystal films: towards higher stability and efficiency