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PEDOT:PSS
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<p>Poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) is a composite material where <a href="/facts/PEDOT/rCH0PV6X">PEDOT</a> (the <a href="/facts/Conductive_polymer/JbwFx9IL">conductive polymer</a>) provides electrical conductivity, and PSS (<a href="/facts/Polystyrene_sulfonate/wfgeTdAh">polystyrene sulfonate</a>) acts as a counter-ion to balance the charge and improve the water solubility and processability of PEDOT. Polystyrene sulfonate is a <a href="/facts/Aromatic_sulfonation/CLjgNq89">sulfonated</a> <a href="/facts/Polystyrene/dfIVntty">polystyrene</a>. Part of the <a href="/facts/Sulfonyl/UbpYXVvN">sulfonyl</a> groups are <a href="/facts/Deprotonation/SmUSh369">deprotonated</a> and carry a negative charge. The other component <a href="/facts/Poly(3%2c4-ethylenedioxythiophene)/rCH0PV6X">poly(3,4-ethylenedioxythiophene)</a> (PEDOT) is a <a href="/facts/Conjugated_system/Ddx9qzox">conjugated</a> polymer and carries positive charges and is based on <a href="/facts/Polythiophene/hxWfRhS7">polythiophene</a>. Together the <a href="/facts/Electric_charge/xxsBfmlB">charged</a> <a href="/facts/Macromolecule/039ULSLg">macromolecules</a> form a macromolecular <a href="/facts/Salt_(chemistry)/lsSKwGpn">salt</a>. </p>