To model the active layer in the hetero-junction solar cells, the C60, C70, PC60BM, PCBDAN fullerenes as acceptor, and (OS)n=1) oligoselenophenes as donor were considered. The (OS)n=14/C60, (OS)n=14/C70, (OS)n=14/PC60BM, and (OS)n=14/PCBDAN blends as a model of the active layer in the BHJ solar cell were chosen, and the optoelectronic properties were studied. The calculated efficiency of these ...

Perovskite silicon tandem solar cells can overcome the efficiency limit of single-junction cells. In two-terminal perovskite cells, current matching subcells is an important requirement. Herein, a current-matched cell using planar front/ rear side-textured heterojunction bottom with p–i–n top that yields high certified short-circuit density 19.6 mA cm−2 reported. Measures taken to improve devic...

GaAs nanowires (NWs) offer the possibility of decoupling light absorption from charge transport for high-performance photovoltaic (PV) devices. However, it is still an open question as to whether these devices can exceed the Shockley-Queisser efficiency limit for single-junction PV. In this work, single standing GaAs-based nanowire solar cells in both radial and vertical junction configurations...

An effective way to improve polymer solar cell efficiency is to use a tandem structure, as a broader part of the spectrum of solar radiation is used and the thermalization loss of photon energy is minimized. In the past, the lack of high-performance low-bandgap polymers was the major limiting factor for achieving high-performance tandem solar cell. Here we report the development of a high-perfo...

Triple-junction a-Si/a-SiGe/a-SiGe solar cells are fabricated in our laboratory using a multi-chamber, loadlocked PECVD system. By improving intrinsic layers, doped layers and using bandgap graded buffer layers for aSiGe component cells, we improved our triple-cell performance and achieved a 12.71% initial efficiency and a 10.7% stable efficiency after 1000 hours of 1-sun light soaking. Samples...

The paper gives an overview over recent results and future potentials of the cornbined ainorphous silicon/microcrys~alline silicon "micromorph" tandem cell technology. The reported results include replacement of boron-microdoping compensation by employment of gas-purification to obtain mid-gap iriicrocrystailine silicon, leading to tne fabrication of a 3.6 ~m thick microcrystalline silicon p-i-...

To realize the high efficiency potential of perovskite/chalcopyrite tandem solar cells in modules, hydrogenated In2O3 (IO:H) as electrode is investigated. IO:H with an electron mobility of 100 cm 2 ·V -1 ·s -1 is demonstrated. Compared to the conventional Sn doped In2O3 (ITO), IO:H exhibits a decreased electron concentration and leads to almost no subbandgap absorption up to the wavelength of 1...

Microsystem technology (MST) has enabled silicon sensors to evolve from simple transduction elements to microsystems (micro-instruments) that include readout circuits, self-test, and auto-zeroing facilities. This paper discusses the impact of MST in the instrumentation and measurement (I&M) field. In metrology, in particular, the development of electrical reference standards by using microtechn...

The most efficient photovoltaic devices under the AM1.5 spectrum use the design concept of dividing the solar spectrum among multiple photovoltaic subcells, or “spectrum splitting” to improve performance beyond the capabilities of single junction designs [1–3]. However, tailoring the selection of subcell band gaps to the specific design spectrum raises the possibility of increased sensitivity o...