Copper-induced majority charge carrier reversal in bismuth telluride-based nanothermoelectrics

2019 ◽  
Author(s):  
Niraj Kumar Singh ◽  
Ganpati Ramanath ◽  
Ajay Soni
Keyword(s):  
Charge Carrier ◽  
Bismuth Telluride ◽  
Majority Charge Carrier

Modulation of Majority Charge Carrier from Hole to Electron by Incorporation of Cyano Groups in Diketopyrrolopyrrole-Based Polymers

2017 ◽  
Vol 50 (19) ◽  
pp. 7550-7558 ◽  
Author(s):  
Hee Su Kim ◽  
Gunel Huseynova ◽  
Yong-Young Noh ◽  
Do-Hoon Hwang
Keyword(s):  
Charge Carrier ◽  
Majority Charge Carrier ◽  
Cyano Groups

Hot-Probe Method for Majority Charge Carrier Determination in Methylammonium Lead Halide Perovskites

2021 ◽  
Vol 11 (2) ◽  
pp. 368-373
Author(s):  
Saeed Fathi ◽  
Elnaz Bagherzadeh-khajehmarjan ◽  
Arash Nikniazi ◽  
Babak Olyaeefar ◽  
Sohrab Ahmadi-kandjani
Keyword(s):  
Charge Carrier ◽  
Probe Method ◽  
Majority Charge Carrier ◽  
Halide Perovskites ◽  
Hot Probe ◽  
Lead Halide

scholarly journals Impact of K+ Doping on Modulating Majority Charge Carrier Type and Quality of Perovskite Thin Films by Two-step Solution Method for Solar Cells

Coatings ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 647 ◽  
Author(s):  
Yujun Yao ◽  
Xiaoping Zou ◽  
Jin Cheng ◽  
Tao Ling ◽  
Chuangchuang Chang ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Solar Cells ◽  
Charge Carrier ◽  
Physical Properties ◽  
Perovskite Solar Cells ◽  
Tio2 Layer ◽  
Perovskite Layer ◽  
Majority Charge Carrier ◽  
Majority Carrier

Traditional hetero-junction perovskite solar cells are composed of light-absorbing layers, charge carrier-transporting layers, and electrodes. Recently, a few papers on homo-junction perovskite solar cells have been studied. Here, we studied the effect of K+ doping on TiO2/PbI2 interface quality, perovskite film morphology, photo-physical properties, and majority carrier type. In particular, the K+ extrinsic doping can modulate the majority carrier type of the perovskite thin film. The study indicated that the interface between the perovskite layer and the TiO2 layer deteriorates with the increase of K+ doping concentration, affecting the electron transport ability from the perovskite film to the TiO2 layer and the photo-physical properties of the perovskite layer by K+ doping. In addition, the majority charge carrier type of perovskite thin films can be changed from n-type to p-type after K+ extrinsic doping, and the corresponding hole concentration increased to 1012 cm−3. This approach of modulating the majority charge carrier type of perovskite thin film will pave the way for the investigation of perovskite homo-junction by extrinsic doping for solar cells.

scholarly journals Majority Charge Carrier Transport in Particle-Based Photoelectrodes

2019 ◽  
Vol 123 (43) ◽  
pp. 26082-26094
Author(s):  
Yannick K. Gaudy ◽  
Stefan Dilger ◽  
Simone Pokrant ◽  
Sophia Haussener
Keyword(s):  
Charge Carrier ◽  
Carrier Transport ◽  
Charge Carrier Transport ◽  
Majority Charge Carrier

Majority charge carrier reversal and its effect on thermal and electron transport in xV2O5–(1−x) As2O3 glasses

2012 ◽  
Vol 358 (6-7) ◽  
pp. 1019-1027 ◽  
Author(s):  
Sezhian Annamalai ◽  
Rudra P. Bhatta ◽  
Ian L. Pegg ◽  
Biprodas Dutta
Keyword(s):  
Electron Transport ◽  
Charge Carrier ◽  
Majority Charge Carrier

Characterization of electrochemical photovoltaic cells using polycrystalline CdSe and CdTe electrodes grown by a liquid metal-vapor reaction

1991 ◽  
Vol 6 (6) ◽  
pp. 1293-1299 ◽  
Author(s):  
Zhitsing Deng ◽  
Michelina Cinquino ◽  
Marcus F. Lawrence
Keyword(s):  
Liquid Metal ◽  
Charge Carrier ◽  
Conversion Efficiency ◽  
Carrier Density ◽  
Metal Vapor ◽  
Light Illumination ◽  
Textured Surface ◽  
Charge Carrier Density ◽  
Experimental Conditions ◽  
Majority Charge Carrier

Polycrystalline CdSe and CdTe layers were fabricated by putting liquid Cd in contact with Se or Te vapors under constant Ar flow. The crystalline structure, surface properties, and semiconducting properties of these materials have been determined. Both materials were found to be n-type semiconductors. The results show that, under the proper experimental conditions, the liquid metal-vapor reaction enables the synthesis of polycrystalline CdSe photoelectrodes with a 6.9% energy conversion efficiency when used in an electrochemical photovoltaic cell under 80 mW/cm2 of white light illumination. This efficiency rates amongst the highest ones measured under similar conditions using polycrystalline CdSe. These CdSe layers have a majority charge carrier density of ND = 2.6 × 1017 cm−3 and possess a highly textured surface which is assumed to be mainly responsible for the high photovoltaic efficiency. The highly textured CdTe samples obtained by this process, however, show a photovoltaic conversion efficiency of only 0.2%, and this is seen to be mainly due to their high majority charge carrier density of ND = 7.8 × 1019 cm−3.

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