and the conversion reaction or elimination reaction may be  performed in solution ( e.g. by thermal treatment) under inert  or controlled atmosphere to lead to a soluble or insoluble  conjugated polymer. This method may in general be used  when the conjugated polymer is expected to be soluble in  organic and/or non-organic solvents. Ina further embodiment  according this sixth aspect the precursor polymer may be in  the form of a thin film precursor polymer layer and the con› version or elimination reaction step may be performed under  inert or controlled atmosphere or under vacuum (e.g. by in  situ thermal treatment, or in the second embodiment by acid  treatment).  In any embodiment of the sixth aspect, the precursor poly› mer may be dissolved in a common organic solvent (such as  specified above), followed by a degassing step.  An  illustration of this aspect is the embodiment presented  in examples 1.6 and 7-11 of the preferred embodiments.  In a seventh aspect, the preferred embodiments relate to an  opto-electronic device comprising at least a layer (preferably  a thin layer having e.g. from 20 to 500 nm) of a polymer  according to any embodiments of the third or the fifth aspect.  In embodiments of the seventh aspect, an electronic device  comprising a polymer according to formula (XXIII) is dis› closed.  An  aspect is the electronic device made from the  precursor polymer followed by its conversion reaction  towards the conjugated polymer as pristine material or in  blend.  The device ( e.g. an electronic device) according to the  seventh aspect is advantageous among others due to the lesser  number of structural defects when compared with conjugated  polymers obtained via other methods. As a result, the poly› mers have better properties, resulting in better electronic  devices.  Such devices ( e.g. integrated circuits) have the advantage  of having a lower cost price than corresponding inorganic  devices.  The devices may be, but are not limited hereto, for example  organic field effect transistors, circuits, electroluminescent  devices, organic solar cells or sensors. In a further embodi› ment of the seventh aspect, the device may be organic sensors  such as a chemical sensor or a biological sensor. The rigid  three-dimensional iptycene units can be interesting electron  donor which can induce a porous structure in the bulk conju› gated polymer. The conjugated polymers according to  embodiments of the fifth aspect exhibit a drastic reduction in  fluorescence when an electrostatic interaction occurs in pres› ence of some specific analyte, such as for example but not  limited to electron deficient nitroaromatic vapors or other  RDX or other explosive tracers ( e.g. TNT or DNT). Therefore  those polymer materials are of interest for sensor applica› tions. This principle is illustrated in example 6.  In any embodiments of the seventh embodiment, the pre› cursor polymers with leaving groups ( e.g. dithiocarbamate)  are compatible with a device application. The lifetime of the  device is not influenced by remaining traces ofleaving groups  in the active layer after the conversion reaction.  In an eighth aspect, a method for manufacturing an elec› tronic device is disclosed. The electronic device comprises a  Onto the active soluble or insoluble conjugated polymer  layer, a further annealing treatment may be carried out in  order to remove stresses of the polymer chains induced during  deposition of the thin film layer and in order to induce a  relaxation of the polymer chains and changes in the polymer  film morphology. The annealing treatment may be carried out  at a temperature of from 50 to 200°  C., preferably around 100°  C. ( e.g. from 80 to 130°  C.) This annealing treatment may be  carried out before or after the electrode deposition on top of  the active conjugated polymer layer.  The preferred embodiments further relate to a method of  manufacturing organic transistors or sensors using a precur› sor polymer according to any embodiment of the third aspect.  The active layer made from a soluble precursor polymer may  become effectively active only after a conversion reaction  towards a soluble or insoluble conjugated polymer by elimi› nating leaving groups and forming vinylene double bonds,  e.g. by heat treatment.  This embodiment of the eighth aspect is advantageous over  prior art methods, where the conjugated polymer is the start› ing compound and hence must be soluble in common organic  solvents ( as defined above) to be mixed with e.g. a soluble C$_{60 }$ derivative (for example PCBM in case of organic solar cells  application). Since thermal conversion of the precursor poly› mer of formula (IV) starts at a relatively low temperature ( e.g.  about 100-115°  C.), it is possible to prepare a blend n-type/  p-type, used as active layer, by mixing the precursor polymer  (IV) with PCBM and then carrying out the conversion reac- tion by heat treatment of a thin film whilst keeping the initial  chemical structure of PCBM and simultaneously converting  the soluble precursor polymer to the soluble or insoluble  conjugated polymer. Furthermore, any other p-type material  being a small molecule or an oligomer or a polymer other than  C$_{60 }$ or PCBM and having a chemical structure stable at the  temperature used during the conversion reaction of the pre› cursor polymer towards the conjugated polymer may be also  considered.  In an embodiment of the eight aspect, the preferred  embodiments further relate to a method of manufacturing  bilayer heterojunction organic solar cells using a soluble pre› cursor polymer according to any embodiments of the third  aspect. The layer made from the soluble precursor polymer  may become effectively active only after conversion reaction  towards the related soluble or insoluble conjugated polymer  by an elimination reaction ( e.g. under heat treatment) in situ  in thin film.  During the manufacturing of an opto-electronic device  according to the preferred embodiments, a precursor polymer  (IV) according to any embodiment may be deposited and  subsequently subjected to a thermal conversion step (accord› ing to the first embodiment of the sixth aspect) or to an acid  conversion step (according to the second embodiment of the  sixth aspect) such that an active layer may be formed.  In the eighth aspect, the preferred embodiments relate to  the manufacturing of a device according to any embodiment  of the seventh aspect.  polymer layer. In the method according to the preferred  embodiments, a layer comprising the soluble precursor poly› mer (IV) is deposited. In a next step, the conjugated polymer  (XXIII) layer is obtained by carrying out the conversion reac- tion of the coated soluble precursor polymer layer towards the  active soluble or insoluble conjugated polymer by elimina› tion of the leaving groups and formation of the vinylene  doubled bonds induced by e.g. heat treatment.  US 8,449,985 B2  39  40  In the first embodiment of the sixth aspect, and depending  upon the presence and type ( especially chemical class and  boiling point) of organic solvent, the thermal conversion step  may be performed at a temperature above 30°  C. or above 80°  C., or above 110°  C. The thermal conversion step may be 20  performed at a temperature below 300°  C., or below 250°  C.,  or below 200°  C. The thermal conversion step may be per› formed at constant temperature or at gradually changing tem› peratures, according to a specific temperature/time profile. 