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    <schemaVersion>X0603</schemaVersion>

    <submissionType>D</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0001350102</cik>
        <entityName>Ascent Solar Technologies, Inc.</entityName>
        <issuerAddress>
            <street1>12300 GRANT STREET</street1>
            <city>THORNTON</city>
            <stateOrCountry>CO</stateOrCountry>
            <zipCode>80241</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>(720) 872-5000</issuerPhoneNumber>
        <jurisdictionOfInc>DELAWARE</jurisdictionOfInc>
        <issuerPreviousNameList>
            <value>None</value>
        </issuerPreviousNameList>
        <edgarPreviousNameList>
            <value>None</value>
        </edgarPreviousNameList>
        <entityType>Corporation</entityType>
        <yearOfInc>
            <withinFiveYears>true</withinFiveYears>
            <value>2005</value>
        </yearOfInc>
    </primaryIssuer>

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            <relatedPersonName>
                <firstName>Mohan</firstName>
                <middleName>S.</middleName>
                <lastName>Misra, Ph.D.</lastName>
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                <street1>c/o Ascent Solar Technologies, Inc.</street1>
                <street2>12300 Grant Street</street2>
                <city>Thornton</city>
                <stateOrCountry>CO</stateOrCountry>
                <zipCode>80241</zipCode>
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            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
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        </relatedPersonInfo>
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            <relatedPersonName>
                <firstName>Farhad</firstName>
                <lastName>Moghadam, Ph.D.</lastName>
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                <zipCode>80241</zipCode>
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                <relationship>Director</relationship>
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        </relatedPersonInfo>
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            <relatedPersonName>
                <firstName>Gary</firstName>
                <lastName>Gatchell</lastName>
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                <street2>12300 Grant Street</street2>
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                <zipCode>80241</zipCode>
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        </relatedPersonInfo>
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                <firstName>Prem</firstName>
                <lastName>Nath, Ph.D.</lastName>
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                <street1>c/o Ascent Solar Technologies, Inc.</street1>
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                <zipCode>80241</zipCode>
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                <firstName>Ashutosh</firstName>
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                <zipCode>80241</zipCode>
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            <relatedPersonName>
                <firstName>Joseph</firstName>
                <lastName>Armstrong, Ph.D.</lastName>
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                <zipCode>80241</zipCode>
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                <firstName>Rafael</firstName>
                <lastName>Gutierrez</lastName>
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                <zipCode>80241</zipCode>
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            <relatedPersonName>
                <firstName>Joseph</firstName>
                <lastName>McCabe</lastName>
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                <street1>c/o Ascent Solar Technologies, Inc.</street1>
                <street2>12300 Grant Street</street2>
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                <stateOrCountry>CO</stateOrCountry>
                <zipCode>80241</zipCode>
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                <firstName>Janet</firstName>
                <lastName>Casteel</lastName>
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            <relatedPersonAddress>
                <street1>c/o Ascent Solar Technologies, Inc.</street1>
                <street2>12300 Grant Street</street2>
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                <stateOrCountry>CO</stateOrCountry>
                <zipCode>80241</zipCode>
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                <relationship>Executive Officer</relationship>
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            <relatedPersonName>
                <firstName>Stanley</firstName>
                <middleName>A.</middleName>
                <lastName>Gallery</lastName>
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                <zipCode>80241</zipCode>
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            <relatedPersonName>
                <firstName>Einar</firstName>
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                <zipCode>80241</zipCode>
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            <relatedPersonName>
                <firstName>Amit</firstName>
                <lastName>Kumar, Ph.D.</lastName>
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                <zipCode>80241</zipCode>
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                <relationship>Director</relationship>
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            <relatedPersonName>
                <firstName>T.W. Fraser</firstName>
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            <relatedPersonAddress>
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                <zipCode>80241</zipCode>
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        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Richard</firstName>
                <lastName>Erskine</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Ascent Solar Technologies, Inc.</street1>
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                <zipCode>80241</zipCode>
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        <relatedPersonInfo>
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                <firstName>Richard</firstName>
                <middleName>J.</middleName>
                <lastName>Swanson</lastName>
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            <relatedPersonAddress>
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                <zipCode>80241</zipCode>
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        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Ron</firstName>
                <lastName>Eller</lastName>
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    <offeringData>
        <industryGroup>
            <industryGroupType>Manufacturing</industryGroupType>
        </industryGroup>
        <issuerSize>
            <revenueRange>$1,000,001 - $5,000,000</revenueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>false</isAmendment>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>2009-10-06</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>false</moreThanOneYear>
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        <typesOfSecuritiesOffered>
            <isEquityType>true</isEquityType>
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        <businessCombinationTransaction>
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            <clarificationOfResponse></clarificationOfResponse>
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        <minimumInvestmentAccepted>5000000</minimumInvestmentAccepted>
        <salesCompensationList></salesCompensationList>
        <offeringSalesAmounts>
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            <totalAmountSold>5000000</totalAmountSold>
            <totalRemaining>0</totalRemaining>
            <clarificationOfResponse></clarificationOfResponse>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>1</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
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                <dollarAmount>0</dollarAmount>
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                <dollarAmount>0</dollarAmount>
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            <clarificationOfResponse></clarificationOfResponse>
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                <dollarAmount>0</dollarAmount>
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            <clarificationOfResponse></clarificationOfResponse>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>Ascent Solar Technologies, Inc.</issuerName>
                <signatureName>/s/ Gary Gatchell</signatureName>
                <nameOfSigner>Gary Gatchell</nameOfSigner>
                <signatureTitle>Chief Financial Officer</signatureTitle>
                <signatureDate>2009-10-07</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
