Qichuan Huang, Songwei Liu, Chenbo Min, Zheng Zhou, Donghuan Qin, Dan Wang, Wei Xu and Lintao Hou
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引用次数: 0
Abstract
The back contact of p-type semiconductors and metal electrodes have always been a difficulty in fabricating photovoltaics with high performance. The incompatibility of high HOMO with a metal work function may lead to Schottky contact at a back semiconductor–metal interface and lead to device inversion. Thus, the performance of the photovoltaic is restricted, especially for solution-processed CdTe NC solar cells. In our research, we proposed using Cu salts as a Cu source to dope CdTe NCs and improve the back contact interface. Enhanced performance in solution-processed NC solar cells is achieved by introducing an engineered Cu salt layer (CuCl2 and CuBr2). Exceptional performance is attained with the optimized CdTe NC doped with CuCl2, exhibiting a high short-circuit current of 20.20 mA cm−2, an open-circuit voltage of 0.58 V, and a fill factor of 53.74%, resulting in a power conversion efficiency of 6.3%. These results represent a significant improvement over the control group. Through detailed first principles studies and experimental verification, we demonstrate that the copper halide-doped CdTe NC thin film is promising to promote the carrier concentration of the CdTe NC and suppress carrier recombination by improving band alignment at the back contact interface.
期刊介绍:
The Journal of Materials Chemistry is divided into three distinct sections, A, B, and C, each catering to specific applications of the materials under study:
Journal of Materials Chemistry A focuses primarily on materials intended for applications in energy and sustainability.
Journal of Materials Chemistry B specializes in materials designed for applications in biology and medicine.
Journal of Materials Chemistry C is dedicated to materials suitable for applications in optical, magnetic, and electronic devices.
Example topic areas within the scope of Journal of Materials Chemistry C are listed below. This list is neither exhaustive nor exclusive.
Bioelectronics
Conductors
Detectors
Dielectrics
Displays
Ferroelectrics
Lasers
LEDs
Lighting
Liquid crystals
Memory
Metamaterials
Multiferroics
Photonics
Photovoltaics
Semiconductors
Sensors
Single molecule conductors
Spintronics
Superconductors
Thermoelectrics
Topological insulators
Transistors