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2. Solar-powered calculator - Wikipedia

   en.wikipedia.org/wiki/Solar-powered_calculator

   Solar-powered calculators are hand-held electronic calculators powered by solar cells mounted on the device. [1] They were introduced at the end of the 1970s. [2]Amorphous silicon has been used as a photovoltaic solar cell material for devices which require very little power, such as pocket calculators, because their lower performance compared to conventional crystalline silicon solar cells is ...

3. TI-30 - Wikipedia

   en.wikipedia.org/wiki/TI-30

   TI-30Xa Solar School Edition (2004): a modified version of the TI-30Xa, without the fraction buttons. This calculator is approved for Virginia State Testing. [citation needed] TI-30X IIS and TI-30X IIB (1998): added a two-line, scrollable display and a D-pad for navigating previous results. Solar/battery and battery powered respectively.

4. TI-36 - Wikipedia

   en.wikipedia.org/wiki/TI-36

   TI-36 SOLAR was based on 1985 version of TI-35 PLUS, but incorporates solar cells. It addition to standard features such as trigonometric functions, exponents, logarithm , and intelligent order of operations found in TI-30 and TI-34 series of calculators, it also include base (decimal, hexadecimal , octal , binary ) calculations, complex values ...

5. Calculator - Wikipedia

   en.wikipedia.org/wiki/Calculator

   Credit-card-sized, solar-powered calculator by Braun (1987) Modern pocket calculator with solar and battery powering. In the mid-1970s the first calculators appeared with field-effect, twisted nematic (TN) LCDs with dark numerals against a grey background, though the early ones often had a yellow filter over them to cut out damaging ultraviolet ...

6. Scientific calculator - Wikipedia

   en.wikipedia.org/wiki/Scientific_calculator

   This article needs additional citations for ... a solar-powered digital calculator from the 1980s using a ... A scientific calculator is an electronic ...

7. Shockley–Queisser limit - Wikipedia

   en.wikipedia.org/wiki/Shockley–Queisser_limit

   The Shockley–Queisser limit, zoomed in near the region of peak efficiency. In a traditional solid-state semiconductor such as silicon, a solar cell is made from two doped crystals, one an n-type semiconductor, which has extra free electrons, and the other a p-type semiconductor, which is lacking free electrons, referred to as "holes."