IEEE World Conference on Photovoltaic Energy Conference 

About: IEEE World Conference on Photovoltaic Energy Conference is an academic conference. The conference publishes majorly in the area(s): Silicon & Solar cell. Over the lifetime, 641 publications have been published by the conference receiving 7458 citations.

Exciton Multiplication and Relaxation Dynamics in Quantum Dots: Applications to Ultra-High Efficiency Solar Photon Conversion

Abstract: We show how semiconductor quantum dots may greatly increase photon conversion efficiencies by producing multiple excitons from a single photon. This is possible because quantization of energy levels in quantum dots enhances Auger processes, eliminates the requirement to conserve crystal momentum, and thus promotes multiple exciton generation, Quantum yields of 300% for exciton formation in PbSe, PbS, and PbTe quantum dots have been reported at photon energies about 4 times the HOMO-LUMO transition energy (QD bandgap), indicating the formation of 3 excitons/photon for all photoexcited quantum dots.

The Effect of Soiling on Large Grid-Connected Photovoltaic Systems in California and the Southwest Region of the United States

Abstract: The accumulation of dirt on solar panels ("soiling") can have a significant impact on the performance of PV systems in regions where rainfall is limited for a dry season of several months. This effect is magnified where rainfall is absent in the peak-solar summer months, such as in California and the Southwest region of the United States. This paper describes the effects of soiling on energy production for large grid-connected systems in the US and presents a model for predicting soiling losses.

Long Term Reliability of Photovoltaic Modules

Abstract: BP Solar has utilized long term module exposure data and field return data to determine module lifetimes, expected failure rates and to identify failure mechanisms. While outdoor testing is a must for understanding PV reliability, it takes much too long to be of use in determining the effects of changes in materials, processes or equipment. This paper describes how BP Solar utilizes accelerated stress testing to verify the robustness of its new PV products.

A New Approach to Prevent the Negative Impact of the Metastable Defect in Boron Doped CZ Silicon Solar Cells

Abstract: A new reaction model concerning the boron-oxygen related degradation is presented, introducing a third recombination inactive state, that stabilizes the electrical parameters of Cz-Si solar cells, and the transition to this new inactive state is proven by experimental data. Furthermore, the stability under solar cell working conditions and the formation kinetics of this additional state are discussed.

Sanyo's Challenges to the Development of High-efficiency HIT Solar Cells and the Expansion of HIT Business

Abstract: The world's highest conversion efficiency levels of 21.8% (Voc: 0.718 V, Isc: 3.852 A, FF: 79.0%, confirmed by AIST) with a practical size of 100.4 cm2 has been achieved by using the HIT (Hetero-junction with Intrinsic Thin layer) structure. This high efficiency has been mainly realized by the excellent c-Si/a-Si hetero-interface property obtained by our optimized surface cleaning process and high-quality and low-damage a-Si deposition technologies. This excellent c-Si/a-Si hetero-interface of the HIT structure results in a relatively high open circuit voltage (Voc) over 710 mV. Recently, we have succeeded in achieving an outstanding Voc of 730 mV for other efficient HIT solar cells. This result indicates the possibility of further improvement in the conversion efficiency of HIT solar cells. The higher Voc results in not only a higher conversion efficiency but also an improved temperature coefficient, which is another practical advantage for outdoor use.