Enhanced mobility CsPbI 3 quantum dot arrays for record-efficiency, high-voltage photovoltaic cells
Year: 2017
Type: article
Abstract: deficit. We show that charge carrier mobility within perovskite QD films is dictated by the chemical conditions at the QD-QD junctions. The AX treatments provide a method for tuning the coupling between perovskite QDs, which is exploited for improved charge transport for fabricating high-quality QD films and devices. The AX treatments presented here double the film mobility, enabling increased photocurrent, and lead to a record certified QD solar cell efficiency of 13.43%.
Source: Science Advances
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $4,500
Awards: G1099812780, G201850914, G2587954950, G2726883097, G2731368214, G2939195883, G4370898247, G458469250, G4715723449, NEW STTR PHASE I 2009: SINGLE MODE HOLLOW CORE WAVEGUIDES FOR LONG-WAVE INFRARED (LWIR) LASERS; PI - JASON MICHAEL KRIESEL, G6186658822, G6713878358, G7468015244, G7626931543, G8018629309, G8093572078, G864336024, SOLAR CELLS OR PHOTOVOLTAIC CELLS ARE CRITICAL TO NASA OPERATIONS DUE TO THE ABUNDANCE AND AVAILABILITY OF SOLAR POWER. CURRENT PHOTOVOLTAIC TECHNOLOGY IS BASED ON BULK SEMICONDUCTOR WAFERS WHICH ARE TYPICALLY NON-CONFORMAL. IN CONTRAST FLEXIBLE LIGHTWEIGHT SOLAR CELLS CAN BE INCORPORATED ON TO THE SURFACES OF ROVERS AND HABITATS. THIS CAN BE USED TO GENERATE AUXILIARY POWER THAT CAN POWERADDITIONAL SENSORS OR EXTEND THE BATTERY LIFE DURING SPACE EXPLORATION. THIS RESEARCH PROPOSES THE FABRICATION OF SOLAR CELLS THAT ARE CONFORMAL AND INEXPENSIVE AND CAN BE ADHERED TO A VARIETY OF SURFACES THAT WERE PREVIOUSLY UNSUITABLE FOR PHOTOVOLTAIC TECHNOLOGY. THE OBJECTIVE OF THIS RESEARCH PROPOSAL IS TO FABRICATE THE FIRST FLEXIBLE EFFICIENT QUANTUM DOT SOLAR CELL. THE NANOSCOPIC QUANTUM DOTS ARE CRITICAL TO THIS DEVICE BECAUSE OF THEIR ENHANCED OPTICAL PROPERTIES AND SOLUTION-PROCESSABILITY. SOLUTION-PROCESSABILITY REDUCES THE REQUIRED MATERIAL BECAUSE THIN SEMICONDUCTOR QUANTUM DOT FILMS CAN BE DEPOSITED USING LOW COST METHODS SUCH AS INKJET PRINTING. NOT ONLY DOES THIS REDUCE THE WEIGHT AND COST OF THE DEVICE BUT IT ALSO ENABLES THE USE OF FLEXIBLE AND CONFORMAL SUBSTRATES. THUS SOLUTIONPROCESSABLEQUANTUM DOTS CAN IMPROVE THE OPTICAL EFFICIENCY REDUCE THE WEIGHT AND COST AND ENABLE FLEXIBLE AND CONFORMAL DEVICES. AS A TRADE-OFF ADDITIONAL PLASMONIC-ENHANCED LIGHT ABSORPTION TECHNIQUES WILL BE REQUIRED TO ACHIEVE HIGH POWER CONVERSION EFFICIENCIES. THIS PLASMONIC-EHANCED LIGHT ABSORPTION REQUIRES METAL NANOPARTICLES TO SCATTER AND CONCENTRATE LIGHT IN THE SOLAR CELL. USING NANOSCALE STRUCTURES CAN IMPROVE SOLAR CELL POWER CONVERSION EFFICIENCY IN A LIGHTWEIGHT FLEXIBLE DEVICE. TO ACHIEVE THE OPTIMAL DESIGN CONFIGURATION THE QUANTUM DOT FILMS MUST BE FABRICATED AND CHARACTERIZED. ONCE THE QUANTUM DOT FILM CAN BE QUANTIFIED IN ELECTRICALAND OPTICAL TERMS THE DEVICE PERFORMANCE CAN BE MODELED. IN PARTICULAR MODELING OF OPTICAL BEHAVIOR IS PERFORMED BY FINITEDIFFERENCE TIME-DOMAIN (FDTD) SIMULATION SOFTWARE WHEREAS ELECTRONIC BEHAVIOR IS MODELED USING A SOLAR CELL SIMULATION TOOL PC1D. SINCE MANY OF THE DEVICE PARAMETERS ARE INTER-RELATED TO THE DEVICE PERFORMANCE BOTH ELECTRONIC AND OPTICAL SIMULATION RESULTS MUST BE USED TO OPTIMIZE ALL OF THE DEVICE PARAMETERS. AFTER OPTIMIZATION AN EFFICIENT FLEXIBLE LIGHTWEIGHT QUANTUM DOT SOLAR CELL CAN BE FABRICATED. IN ADDITION TO IMPROVING PHOTOVOLTAIC TECHNOLOGY RESEARCH IN THIS FIELD CAN ADVANCE THE UNDERSTANDING OF NANO-SCALE DEVICE DESIGN. THESE QUANTUM DOTS CONTAIN APPROXIMATELY 100 TO 100 000 ATOMS AND BEHAVE VERY DIFFERENTLY FROM THEIR MACROSCOPIC COUNTERPARTS. SINCE MANY OF THE PROPERTIES OBSERVED AT THIS NANOSCOPIC SCALE ARE GOVERNED BY THE PRINCIPLES OF QUANTUM MECHANICS ONGOINGRESEARCH MUST RELATE NANO-SCALE PHENOMENA TO MACROSCOPIC BEHAVIOR. BOTH EXPERIMENTAL AND SIMULATION TECHNIQUES ARE USED IN THIS RESEARCH PROPOSAL TO RELATE THEORY OF NANO-SCALE PHENOMENA INTO A REAL-WORLD FUNCTIONAL DEVICE.
OpenAlex ID: W2767027396