Incorporation of a Redox-Active Bis(guanidine) in Low-Dimensional Tin and Lead Iodide Structures

2017 ◽  
Vol 2017 (47) ◽  
pp. 5539-5544 ◽  
Author(s):  
Hendrik Herrmann ◽  
Petra Walter ◽  
Elisabeth Kaifer ◽  
Hans-Jörg Himmel
Keyword(s):  
Lead Iodide ◽  
Redox Active ◽  
Low Dimensional

scholarly journals Front Cover: Incorporation of a Redox-Active Bis(guanidine) in Low-Dimensional Tin and Lead Iodide Structures (Eur. J. Inorg. Chem. 47/2017)

2017 ◽  
Vol 2017 (47) ◽  
pp. 5536-5536
Author(s):  
Hendrik Herrmann ◽  
Petra Walter ◽  
Elisabeth Kaifer ◽  
Hans-Jörg Himmel
Keyword(s):  
Lead Iodide ◽  
Front Cover ◽  
Redox Active ◽  
Low Dimensional

scholarly journals Incorporation of a Redox-Active Bis(guanidine) in Low-Dimensional Tin and Lead Iodide Structures

2017 ◽  
Vol 2017 (47) ◽  
pp. 5537-5537
Author(s):  
Hendrik Herrmann ◽  
Petra Walter ◽  
Elisabeth Kaifer ◽  
Hans-Jörg Himmel
Keyword(s):  
Lead Iodide ◽  
Redox Active ◽  
Low Dimensional

Structure-Dependent Photoluminescence in Low-Dimensional Ethylammonium, Propylammonium, and Butylammonium Lead Iodide Perovskites

2019 ◽  
Vol 12 (4) ◽  
pp. 5008-5016 ◽  
Author(s):  
Chang-Wei Lin ◽  
Fangzhou Liu ◽  
Ting-Yang Chen ◽  
Kuan-Hua Lee ◽  
Chung-Kai Chang ◽  
...  
Keyword(s):  
Lead Iodide ◽  
Low Dimensional

scholarly journals The Effect of Structural Dimensionality on Carrier Mobility in Lead-Halide Perovskites

2019 ◽  
Author(s):  
Noor Titan Putri Hartono ◽  
Shijing Sun ◽  
María Gélvez-Rueda ◽  
Polly Pierone ◽  
Matthew Erodici ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Carrier ◽  
Carrier Mobility ◽  
Perovskite Solar Cells ◽  
Charge Carrier Mobility ◽  
Lead Iodide ◽  
Optical Pump ◽  
Structural Dimensionality ◽  
Low Dimensional ◽  
Lower Dimensional

<p>Methylammonium lead iodide (MAPI) is a prototypical photo absorber in perovskite solar cells (PSCs), reaching efficiencies above 20%. However, its hygroscopic nature has prompted the quest to find water-resistant alternatives. Recent studies have suggested that mixing MAPI with lower dimensional, bulky-<i>A</i>-site-cation perovskites helps mitigate this environmental instability. On the other hand, low dimensional perovskites suffer from poor device performance, which has been suggested to be due to limited out-of-plane charge carrier mobility resulting from structural dimensionality and large binding energy of the charge carriers. To understand the effects of dimensionality on performance, we systematically mixed MA-based 3D perovskites with larger <i>A</i>-site cation, dimethylammonium, iso-propylammonium, and t-butylammonium lead iodide perovskites. During the shift from MAPI to lower dimensional (LD) PSCs, the efficiency is significantly reduced by 2 orders of magnitude, with short-circuit currents decreasing from above 20 mA/cm<sup>2</sup> to less than 1 mA/cm<sup>2</sup>. In order to explain these decrease in performance, we studied the charge carrier mobilities of these materials using optical-pump/ terahertz-probe, time-resolved microwave photoconductivity, and photoluminescence measurements. The results show that as we add more of the low dimensional perovskites, the mobility decreases by a factor of 20 when it reaches pure LD perovskites. In addition, the photoluminescence decay fitting is slightly slower for the mixed perovskites, suggesting some improvement in the recombination dynamics. These findings indicate that changes in structural dimensionality by mixing<i> A</i>-site cations play an important role in measured charge carrier mobility, and in the performance of perovskite solar cells.</p>

High performance low-dimensional perovskite solar cells based on a one dimensional lead iodide perovskite

2019 ◽  
Vol 7 (15) ◽  
pp. 8811-8817 ◽  
Author(s):  
Chunqing Ma ◽  
Dong Shen ◽  
Bin Huang ◽  
Xiaocui Li ◽  
Wen-Cheng Chen ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Performance ◽  
Perovskite Solar Cells ◽  
Lead Iodide ◽  
One Dimensional ◽  
Low Dimensional

One-dimensional perovskites enable high performance low-dimensional perovskite solar cells.

Electronic structures of lead iodide based low-dimensional crystals

2003 ◽  
Vol 67 (15) ◽  
Author(s):  
T. Umebayashi ◽  
K. Asai ◽  
T. Kondo ◽  
A. Nakao
Keyword(s):  
Electronic Structures ◽  
Lead Iodide ◽  
Low Dimensional

scholarly journals Confinement Effects in Low-Dimensional Lead Iodide Perovskite Hybrids

2016 ◽  
Vol 28 (13) ◽  
pp. 4554-4562 ◽  
Author(s):  
Machteld E. Kamminga ◽  
Hong-Hua Fang ◽  
Marina R. Filip ◽  
Feliciano Giustino ◽  
Jacob Baas ◽  
...  
Keyword(s):  
Confinement Effects ◽  
Lead Iodide ◽  
Low Dimensional

scholarly journals Redox-Active Guanidines with One or Two Guanidino Groups and Their Integration in Low-Dimensional Perovskite Structures

2019 ◽  
Vol 2019 (38) ◽  
pp. 4147-4160 ◽  
Author(s):  
Petra Walter ◽  
Elisabeth Kaifer ◽  
Hendrik Herrmann ◽  
Hubert Wadepohl ◽  
Olaf Hübner ◽  
...  
Keyword(s):  
Redox Active ◽  
Low Dimensional

scholarly journals Ultrasensitive Materials for Electrochemical Biosensor Labels

Sensors ◽  
2020 ◽  
Vol 21 (1) ◽  
pp. 89
Author(s):  
Aneesh Koyappayil ◽  
Min-Ho Lee
Keyword(s):  
Carbon Materials ◽  
Electrochemical Biosensor ◽  
Electrochemical Techniques ◽  
Label Free ◽  
The Past ◽  
Redox Active ◽  
Sensitive Determination ◽  
Detection Of Biomolecules ◽  
Low Dimensional

Since the fabrication of the first electrochemical biosensor by Leland C. Clark in 1956, various labeled and label-free sensors have been reported for the detection of biomolecules. Labels such as nanoparticles, enzymes, Quantum dots, redox-active molecules, low dimensional carbon materials, etc. have been employed for the detection of biomolecules. Because of the absence of cross-reaction and highly selective detection, labeled biosensors are advantageous and preferred over label-free biosensors. The biosensors with labels depend mainly on optical, magnetic, electrical, and mechanical principles. Labels combined with electrochemical techniques resulted in the selective and sensitive determination of biomolecules. The present review focuses on categorizing the advancement and advantages of different labeling methods applied simultaneously with the electrochemical techniques in the past few decades.

scholarly journals The Effect of Structural Dimensionality on Carrier Mobility in Lead-Halide Perovskites

2019 ◽  
Author(s):  
Noor Titan Putri Hartono ◽  
Shijing Sun ◽  
María Gélvez-Rueda ◽  
Polly Pierone ◽  
Matthew Erodici ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Carrier ◽  
Carrier Mobility ◽  
Perovskite Solar Cells ◽  
Charge Carrier Mobility ◽  
Lead Iodide ◽  
Optical Pump ◽  
Structural Dimensionality ◽  
Low Dimensional ◽  
Lower Dimensional

<p>Methylammonium lead iodide (MAPI) is a prototypical photo absorber in perovskite solar cells (PSCs), reaching efficiencies above 20%. However, its hygroscopic nature has prompted the quest to find water-resistant alternatives. Recent studies have suggested that mixing MAPI with lower dimensional, bulky-<i>A</i>-site-cation perovskites helps mitigate this environmental instability. On the other hand, low dimensional perovskites suffer from poor device performance, which has been suggested to be due to limited out-of-plane charge carrier mobility resulting from structural dimensionality and large binding energy of the charge carriers. To understand the effects of dimensionality on performance, we systematically mixed MA-based 3D perovskites with larger <i>A</i>-site cation, dimethylammonium, iso-propylammonium, and t-butylammonium lead iodide perovskites. During the shift from MAPI to lower dimensional (LD) PSCs, the efficiency is significantly reduced by 2 orders of magnitude, with short-circuit currents decreasing from above 20 mA/cm<sup>2</sup> to less than 1 mA/cm<sup>2</sup>. In order to explain these decrease in performance, we studied the charge carrier mobilities of these materials using optical-pump/ terahertz-probe, time-resolved microwave photoconductivity, and photoluminescence measurements. The results show that as we add more of the low dimensional perovskites, the mobility decreases by a factor of 20 when it reaches pure LD perovskites. In addition, the photoluminescence decay fitting is slightly slower for the mixed perovskites, suggesting some improvement in the recombination dynamics. These findings indicate that changes in structural dimensionality by mixing<i> A</i>-site cations play an important role in measured charge carrier mobility, and in the performance of perovskite solar cells.</p>

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