scholarly journals Indirect to direct bandgap transition in methylammonium lead halide perovskite

2017 ◽  
Vol 10 (2) ◽  
pp. 509-515 ◽  
Author(s):  
Tianyi Wang ◽  
Benjamin Daiber ◽  
Jarvist M. Frost ◽  
Sander A. Mann ◽  
Erik C. Garnett ◽  
...  
Keyword(s):  
High Pressure ◽  
Charge Carrier ◽  
Carrier Lifetime ◽  
Direct Bandgap ◽  
Radiative Efficiency ◽  
Halide Perovskites ◽  
Halide Perovskite ◽  
Charge Carrier Lifetime ◽  
Lead Halide

Unusually long charge carrier lifetime in methylammonium lead halide perovskites is a result of the Rashba-split indirect bandgap. At high pressure the bandgap becomes purely direct, with shorter carrier lifetime and higher radiative efficiency.

scholarly journals Extraordinarily High Minority Charge Carrier Lifetime Observed in Crystalline Silicon

Solar RRL ◽  
2021 ◽  
Author(s):  
Bernd Steinhauser ◽  
Tim Niewelt ◽  
Armin Richter ◽  
Rebekka Eberle ◽  
Martin Schubert
Keyword(s):  
Charge Carrier ◽  
Carrier Lifetime ◽  
Crystalline Silicon ◽  
Minority Charge Carrier ◽  
Charge Carrier Lifetime

scholarly journals Enhancing Charge Carrier Lifetime in Metal Oxide Photoelectrodes through Mild Hydrogen Treatment

2017 ◽  
Vol 7 (22) ◽  
pp. 1701536 ◽  
Author(s):  
Ji-Wook Jang ◽  
Dennis Friedrich ◽  
Sönke Müller ◽  
Marlene Lamers ◽  
Hannes Hempel ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Metal Oxide ◽  
Carrier Lifetime ◽  
Hydrogen Treatment ◽  
Charge Carrier Lifetime

scholarly journals Lead-Free Halide Double Perovskites: A Review of the Structural, Optical, and Stability Properties as Well as Their Viability to Replace Lead Halide Perovskites

Metals ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 667 ◽  
Author(s):  
Edson Meyer ◽  
Dorcas Mutukwa ◽  
Nyengerai Zingwe ◽  
Raymond Taziwa
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Lead Free ◽  
Double Perovskites ◽  
Stability Properties ◽  
Perovskite Materials ◽  
Halide Perovskites ◽  
Halide Perovskite ◽  
Light Absorbers ◽  
Lead Halide

Perovskite solar cells employ lead halide perovskite materials as light absorbers. These perovskite materials have shown exceptional optoelectronic properties, making perovskite solar cells a fast-growing solar technology. Perovskite solar cells have achieved a record efficiency of over 20%, which has superseded the efficiency of Gräztel dye-sensitized solar cell (DSSC) technology. Even with their exceptional optical and electric properties, lead halide perovskites suffer from poor stability. They degrade when exposed to moisture, heat, and UV radiation, which has hindered their commercialization. Moreover, halide perovskite materials consist of lead, which is toxic. Thus, exposure to these materials leads to detrimental effects on human health. Halide double perovskites with A2B′B″X6 (A = Cs, MA; B′ = Bi, Sb; B″ = Cu, Ag, and X = Cl, Br, I) have been investigated as potential replacements of lead halide perovskites. This work focuses on providing a detailed review of the structural, optical, and stability properties of these proposed perovskites as well as their viability to replace lead halide perovskites. The triumphs and challenges of the proposed lead-free A2B′B″X6 double perovskites are discussed here in detail.

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